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  • Numerical simulation of intranasal air flow and ...

    A numerical simulation applying the computational fluid dynamics (CFD) solver Fluent 6.1.22 was performed displaying inspiratory intranasal air temperature and airflow patterns. Results: Due to resection of the turbinates the airflow pattern is disturbed resulting in a spacious vortex throughout the entire nasal cavity. Hence, contact between ...

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  • Numerical Simulation of Spray Behavior and Its Interaction ...

    1999-5-1 · A numerical study was performed to investigate spray behavior and its interaction with air flow in a flame holding region of an oil burner(0.1MW) using the KIVA3 code. The numerical results in shape of the recirculating flow and size of the recirculation zone under different conditions were compared to those experimental results.

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  • Numerical simulation of two-dimensional room air flow with ...

    2000-6-1 · The air flow and temperature distribution during heating and ventilation in a model room has been studied. The inlets and outlets are on opposite walls and cover the full width of the room making the flow essentially two-dimensional; obstructions within the room are also not considered for simplicity.

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  • Numerical simulation of air flow over a passenger car and ...

    Numerical simulation of air flow over a passenger car and the influence of rear spoiler using CFD International Journal of Advanced Transport Phenomena Vol. 01, No. 01, December 2012, pp 6-13

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  • (PDF) Numerical simulation of air flow in a general wad of ...

    The air mass flow rate increased from about 0.57 to 0.91 kg/s at chimney height of 5 and 9 m respectively for no wind condition and SHF of 400 W/m². The power outputs obtained from the SC with ...

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  • Numerical simulation on behavior of liquid jet issued into ...

    The numerical simulations have been performed to clarify the effects of the turbulence in the liquid on the deformation of liquid jet surface issued into the air flow. The turbulences in the liquid jet were simulated by the Rankin vortices, and the liquid jet surface was tracked numerically by …

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  • (PDF) Numerical simulation of air–soil two-phase flow ...

    Nat Hazards (2011) 58:311–323 DOI 10.1007/s11069-010-9669-4 ORIGINAL PAPER Numerical simulation of air–soil two-phase flow based on turbulence modeling Yu Huang • Hu Zheng • Wuwei Mao • Guanghui Li • Bin Ye Received: 20 October 2010 Accepted: 12 November 2010 Published online: 1 December 2010 Ó Springer Science+Business Media B.V. 2010 Abstract Soil flow and induced air …

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  • Developing efficient tools to evaluate indoor environment ...

    2006-9-29 · of air velocity, temperature and at a later stage pollutants concentration that describe the flow field characteristics and the contaminant level in the test room considered. Detailed measurements of indoor air flow are difficult to accomplish because similar to numerical simulations behavior …

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  • Numerical simulation of an air-supported structure in the ...

    Numerical simulation of the tunnel test of large-scale air-supported model has been carried out as an example of using this technique. Wind tunnel study is described in the papers1, 2. Experimental deformed shape, pressure coefficients and aerodynamic forces were compared with the results of presented numerical simulation.

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  • Numerical simulation of water spray transport along a ...

    2020-1-31 · Water spraying is widely being used in many industrial applications because of the benefits it has shown over cooling. This paper presents a numerical investigation to simulate evaporating water spray along a plate of an exchanger. Indeed, we were interested in a horizontal channel whose lower wall is the plate of the exchanger maintained at a heating flow. This plate is exposed to a turbulent ...

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  • [PDF] Numerical Simulation of the Air Flow and Thermal ...

    Results of numerical simulations of the air flow including the heat transport and the thermal radiation as well as the thermal comfort of passengers in a train cabin are presented. The computations have been performed by coupling flow simulations conducted with the computational fluid dynamics (CFD) code OpenFOAM with finite-element simulations of the heat transport within the passengers using ...

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  • A numerical simulation of air flow in the human ...

    2021-1-6 · The numerical model included the area from the front tip of the nose to the posterior end of the nasal concha. As displayed in Fig. 1a, b, the nasopharynx was expanded to fit the experimental setup. The geometry of the human nasal cavity was created by aligning and processing 40 computed tomographic (CT) images of the respiratory tract of a healthy man.

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  • Numerical simulations of flow, combustion characteristics ...

    2015-1-22 · This paper presents research on a 660 MW e Foster Wheeler (FW) type down-fired boiler. The arch-supplied over-fire air (OFA) plan and high efficiency measures are proposed for the boiler. The influence of different OFA ratios on flow field, temperature distribution, and O 2 and NO x concentration distributions inside the furnace are investigated by numerical simulation using Fluent 6.3.26 ...

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  • Numerical simulation of air–soil two-phase flow based on ...

    2010-12-1 · Soil flow and induced air blasts are of great harm to humanity, and historically they have caused a lot of damage to infrastructure. However, these phenomena cannot be described by traditional analog modeling methods that limit their use in disaster prevention efforts. Computational fluid dynamics (CFD) is an applied technique commonly used in a range of fields including the chemical industry ...

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  • Numerical Simulation of Air–Water Two-Phase Flow on ...

    Stepped spillways are commonly used under relatively low unit discharge, where cavitation pitting can be avoided by self-aerated flow. However, there are several dams in China with stepped spillways in combination with X-shaped flaring gate piers with unit design discharge considerably larger than specified in the available guidelines. Consequently, air–water two-phase flow on stepped ...

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  • (PDF) Numerical simulation of solar radiation, air flow ...

    Numerical simulation of solar radiation, air flow and temperature distribution in a naturally ventilated tunnel greenhouse December 2010 Agricultural Engineering International : The CIGR e-journal ...

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  • [PDF] NUMERICAL SIMULATION OF SLUG FLOW REGIME FOR AN AIR ...

    Fluid mechanics of air-water slug flows in horizontal circular pipes is investigated using detailed, transient, 3-dimensional Computational Fluid Dynamics (CFD) simulations. The inhomogeneous twophase or mixture model combined with the interface sharpening (free surface) algorithm, implemented in the commercial CFD code CFX-5.7, has been used to predict the transition of a segregated air-water ...

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  • BEM numerical simulation of coupled heat, air and moisture ...

    BEM numerical simulation of coupled heat, air and moisture flow through a multilayered porous solid. ... which provides highly accurate numerical results. Three test benchmark examples (moisture uptake in a semi-infinite region, air transfer through a lightweight wall, and moisture redistribution inside a multilayered wall with capillary-active ...

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  • Review of Experimental-Numerical Methodologies and ...

    2020-10-12 · Due to the dissimilar scaling issues, the conventional experimental method of FOWTs can hardly be used directly to validate the full-scale global dynamic responses accurately. Therefore, it is of absolute necessity to find a more accurate, economic and efficient approach, which can be utilized to predict the full-scale global dynamic responses of FOWTs. In this paper, a literature review of ...

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  • Numerical Model Inter-comparison for Wind Flow and ...

    2010-9-7 · Wind flow and turbulence within the urban canopy layer can influence the heating and ventilation of buildings, affecting the health and comfort of pedestrians, commuters and building occupants. In addition, the predictive capability of pollutant dispersion models is heavily dependent on wind flow models. For that reason, well-validated microscale models are needed for the simulation of …

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  • Numerical Simulation of Ventilation Air Flow in ...

    2019-10-11 · Numerical Simulation of Ventilation Air Flow in Underground Mine Workings S.M. Aminossadati The University of Queensland, CRCMining, Brisbane, Australia K. Hooman The University of Queensland, Brisbane, Australia ABSTRACT: In recent years, Computational Fluid Dynamics, CFD, has been commonly utilized in the mining

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  • A numerical simulation of air flow in the human ...

    2021-1-6 · A numerical simulation of air flow in the human respiratory system for various environmental conditions Alibek Issakhov1,2*, Yeldos Zhandaulet1,2, Aizhan Abylkassymova1,2 and Assylbek Issakhov1,2 Abstract The functions of the nasal cavity are very important for maintaining the internal environment of the lungs since the

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  • Numerical Simulation of Air Flow Arrangement and Energy ...

    In this paper, we study the building air-conditioned room in the small space and establishment the mathematical numerical simulation model which is for the designing and energy saving of the air distribution, We analysis the energy effect on five types of the airflow organization based on simulation software developed by our research team to study the designing and energy saving of the air ...

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  • NUMERICAL SIMULATION OF THE AIR FLOW FIELD IN THE

    NUMERICAL SIMULATION OF THE AIR FLOW FIELD IN THE MELT BLOWING PROCESS WITH THE USE OF AN AUXILIARY NOZZLE. pages 473-482. DOI: 10.1615/HeatTransRes.2013006087. Get access. Yuanling Cheng College of Textile and Clothing Engineering, National Engineering Laboratory for Modern Silk, Soochow University, Suzhou 215006, China.

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  • Numerical Simulation of Complex Air Flow in an

    2010-2-16 · Sun, Z, Chew, JW, & Fomison, N. 'Numerical Simulation of Complex Air Flow in an Aeroengine Gear Box.' Proceedings of the ASME Turbo Expo 2009: Power for Land, Sea, and Air.

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  • Numerical Simulation and Experimental Verification of Air ...

    CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Abstract—The phenomenon of forced convection with turbulent flow is chaotic, complex and hard to develop analytically. Only key to the problem is experimental correlations and numerical solution. The goal of our project is to validate the Dittus-Boelter equation, a correlation used to find the value of heat transfer ...

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  • DIRECT NUMERICAL SIMULATION OF FREE-SURFACE AND ...

    2019-10-24 · DIRECT NUMERICAL SIMULATION OF FREE-SURFACE AND INTERFACIAL FLOW. ... coughing, and sneezing release a turbulent puff cloud of hot and moist air containing suspended droplets trapped within it. The cloud and its payload can t... Figure 4: Contrasting the isolated droplet emission picture of Wells (1934, 1955) with the recently developed ...

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  • Numerical simulation of oil and air two-phase flow in a ...

    2021-7-22 · Jaeyeol Cho, Nahmkeon Hur, Jongrak Choi, Jiwon Yoon. Numerical simulation of oil and air two-phase flow in a planetary gear system using the overset mesh technique. 16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, Apr 2016, Honolulu, United States. hal-01894398

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  • Numerical simulation of high inertial liquid-in-gas ...

    Aqueous microdroplet generation involving high inertial air flow inside a T-junction microchannel was studied numerically. The volume of fluid method was employed to track the interface between two immiscible fluids: water and air. The effects of high inertial air flow …

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  • SLSHOLQHDSSDUDWXV Dynamical Behaviour of H 2

    Air pockets can develop in a pipeline by bubble entrainment at inflow locations (headrace tunnel intake structure, pump sump) and by gas release as the water pressure falls (steady or unsteady flow conditions) or the temperature rises. In addition, air valves may contain residual air if the air discharge is not properly controlled [2].

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  • electronic library - Numerical Simulation of the Air Flow ...

    2021-8-13 · Konstantinov, Mikhail und Lautenschlager, Waldemar und Shishkin, Andrei und Wagner, Claus (2014) Numerical Simulation of the Air Flow and Thermal Comfort in Aircraft Cabins. In: New Results in Numerical and Experimental Fluid Mechanics IX Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 124.

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  • Numerical Simulation of Air Flow inside Acoustic Cyclone ...

    2014-8-25 · ABSTRACTThis paper presents a novel concept of cyclone separator, where sound waves are used to agglomerate fine particles. Sound waves generated by Hartmann acoustic generator are introduced into the secondary (core) air flow of cyclone separator. Results of numerical simulation of air flows inside conventional and acoustic cyclone separators are presented.

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  • Numerical Simulation of the Air Flow Around the Arrays of ...

    Метаподаци. This paper deals with the numerical simulation of air flow around the arrays of flat plate collectors and determination of the flow field, which should provide a basis for estimating a convective heat losses, a parameter which influences their working characteristics. Heat losses are the result of the reflection on the ...

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  • Numerical simulation of air–water flow in gated tunnels ...

    2020-1-22 · Numerical simulation of air–water flow in gated tunnels Open PDF. Proceedings of the Institution of Civil Engineers - Water Management. ISSN 1741-7589 | E-ISSN 1751-7729. Volume 163 Issue 6, June 2010, pp. 289-295. Prev Next > Numerical simulation of air–water flow in gated tunnels ...

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  • Numerical Simulation of Microscale Ion-Driven Air Flow ...

    2008-5-12 · Ion-driven air flow is a novel method of pumping air at microscale dimensions using the concept of ion drag. The method employs a series of micro-fabricated electrodes to generate strong electric fields that pump unipolar ions through air. Ions collide repeatedly with neutral molecules, thus generating bulk motion of the gas.

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  • Numerical Simulation of Near-Critical and Unsteady ...

    2012-5-17 · Acta Astronautica, Vol. 182. Flame dynamics under various backpressures in a model scramjet with and without a cavity flameholder. Proceedings of the Combustion Institute, Vol. 38, No. 3. On the unsteady throttling dynamics and scaling analysis in a typical hypersonic inlet–isolator flow. Physics of Fluids, Vol. 32, No. 12.

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  • Numerical Simulation of Air Flow around the NP Car

    Numerical Simulation The steady-state, incompressible, turbulent flow of air around the car is solved numerically. The RANS equations in conjunction with the realizable k-ε equations are solved for numerical simulation of the problem. Transport equations for k and ε in the realizable k-ε model are as follows: k t j k b j j k j

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  • Numerical Simulation of the Flow Interaction Between ...

    Boudet, J, Hills, NJ, & Chew, JW. 'Numerical Simulation of the Flow Interaction Between Turbine Main Annulus and Disc Cavities.' Proceedings of the ASME Turbo Expo 2006: Power for Land, Sea, and Air.

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  • Numerical simulation of mass transfer and fluid flow ...

    2020-4-22 · 1 . Numerical simulation of mass transfer and fluid flow evolution of a rectangular free jet of air . Ivan Di Venuta. a, Ivano Petracci a, Matteo Angelino b, Andrea Boghi c, Fabio Goria,*. aDepartment of Industrial Engineering, University of Rome “Tor Vergata”, Via del Politecnico 1, 00133 Rome, Italy.

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  • IOP Conference Series: Materials Science and

    2019-10-1 · behavior of the building structures under the effect of wind loads theoretically, thus necessitating experimental investigations and numerical simulation of wind loads [7, 8]. Experimental studies include a physical simulation method, i.e. testing a …

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  • ufdc.ufl.edu

    2010-11-22 · 7th International Conference on Multiphase Flow ICMF 2010, Tampa, FL USA, May 30-June 4, 2010 Numerical simulation of air-water counter-current two-phase flow in a model of the hot-leg of a pressurized water reactor (PWR) Deendarlianto, Thomas H6hne, Dirk Lucas and Christophe Vallee

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  • Effect of Airfoil Shape on the Aerodynamic performance

    2020-11-16 · The numerical simulation is performed with a two-dimensional unsteady turbulent flow system. Governing equations are: Continuity equation: ∇ ∙(??⃗ )=0 ((1) Momentum equations: X -momentum equation: = (? ) +∇∙(? ?⃗ ) − ? + ? + ? temporal discretization schemes. These numerical (2)

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  • THREE-DIMENSIONAL SIMULATIONS OF ELECTRONIC

    2016-3-23 · Validation of Numerical Model Validation of numerical models has been assured by successfully comparison of test results with experimental data coming from literature. In particular, results of simulation for vertical channels with multiple heat sources plunged in air, have been preliminary compared with those experimentally

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  • DESIGN OPTIMISATION OF A DISC AND PRESSURE DROP BEHAVIOR ...

    In order to achieve that we created three-dimensional numerical simulations and flow setup arrangements like fitting, setup for air and liquid sources, setup for digital reading of pressure by using differential pressure gauges. We did numerical calculations which shows the behavior of the flow …

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  • Analysis of Long Fibers Direction of Transversely ...

    2011-10-31 · modeling and numerical simulation using the explicit finite element method are considered for the study of hyperelastic behavior of a thin, transversely isotropic and incompressible thermoplastic membrane. The thermoforming of the long fiber-reinforced sheet is done under the action of a perfect gas [12]. The Lagrangian formulation together ...

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  • (PDF) Integration of 1D and 3D simulations of engine ...

    As it was a transient (driving at 110km/hr). Air velocity was lowest at the center simulation, heat flow, coolant flow and air flow varied with of condenser (cross shape), as it was blocked by bumper and time horizon. It can be observed how these factors are front- end- structure.

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  • Computational Fluid Dynamics - ESI Group

    Computational Fluid Dynamics (CFD) simulates the flow of liquids and gases, heat and mass transfer, chemical reactions, and related behaviors by solving the numerical equations that represent the physical models. CFD analysis is typically carried out earlier in the design process before the first prototype, for efficient design, or during the ...

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  • PRONET Update - 10

    2018-7-1 · a subsonic air flow in Open FOAM. The calculation of the highly deformed shape of the blade was done in ... with the results of numerical simulation shows that for solving acoustics problems during course and diploma design both commercial and open source software give approximately the same ... FE modeling of nonlinear behavior of RC ...

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  • Sensitivity of Precipitation Statistics to Resolution ...

    2015-8-1 · We perform numerical experiments at different spatial resolutions, varying from 0.11° to 0.037°. In the case of the high-resolution simulation, the model is run at 0.037° in the internal domain and at 0.11° in the external domain, adopting a two-way nesting. In this case, the solution in the nested domain feeds back on the coarse-grid solution.

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  • Computational Fluid Dynamics Investigation of Human ...

    2013-1-12 · Abstract. Computational fluid dynamics was used to investigate particle aspiration efficiency in low-moving air typical of occupational settings (0.1–0.4 m s −1).Fluid flow surrounding an inhaling humanoid form and particle trajectories traveling into the mouth were simulated for seven discrete orientations relative to the oncoming wind (0°, 15°, 30°, 60°, 90°, 135° and 180°).

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  • electronic library - Numerical Simulation of the Air Flow ...

    2021-8-13 · Konstantinov, Mikhail und Lautenschlager, Waldemar und Shishkin, Andrei und Wagner, Claus (2014) Numerical Simulation of the Air Flow and Thermal Comfort in Aircraft Cabins. In: New Results in Numerical and Experimental Fluid Mechanics IX Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 124.

    Get Price
  • CiteSeerX — Numerical Simulation of Air Flow inside ...

    CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): This paper presents a novel concept of cyclone separator where sound waves are used to agglomerate fine particles. Sound waves generated by Hartmann acoustic generator are introduced into the secondary (core) air flow of cyclone separator. Results of numerical simulation of air flows inside conventional and acoustic ...

    Get Price
  • Numerical Simulation of the Air Flow Around the Arrays of ...

    Метаподаци. This paper deals with the numerical simulation of air flow around the arrays of flat plate collectors and determination of the flow field, which should provide a basis for estimating a convective heat losses, a parameter which influences their working characteristics. Heat losses are the result of the reflection on the ...

    Get Price
  • Numerical Simulation of Air Flow through Large Openings ...

    T1 - Numerical Simulation of Air Flow through Large Openings. AU - True, J.P. Jensen. AU - Heiselberg, Per Kvols. AU - Nielsen, Peter Vilhelm. N1 - IEA-Annex 35 Technical Report IEA-Annex 35 Technical Report. PY - 2002. Y1 - 2002. KW - Large openings. KW - CFD. KW - Wind tunnel experiments. KW - Pressure coefficient. KW - Large openings. KW - CFD

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  • Numerical Simulation of Interfacial Phenomenon of Air ...

    2016-10-25 · Zhu, G, & Zhu, H. 'Numerical Simulation of Interfacial Phenomenon of Air-Water Adiabatic Intermittent Flow in Helically Coiled Tubes.' Proceedings of the 2016 24th International Conference on Nuclear Engineering.

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  • Numerical Simulation of Air Flow around the NP Car

    Numerical Simulation The steady-state, incompressible, turbulent flow of air around the car is solved numerically. The RANS equations in conjunction with the realizable k-ε equations are solved for numerical simulation of the problem. Transport equations for k and ε in the realizable k-ε model are as follows: k t j k b j j k j

    Get Price
  • Numerical simulation of three dimensional two-phase flow ...

    T1 - Numerical simulation of three dimensional two-phase flow and prediction of oil retention in an evaporator of the automotive air conditioning system. AU - Stevanovic, Vladimir D. AU - Hrnjak, Pega. PY - 2017/1/1. Y1 - 2017/1/1

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  • Analytical and Numerical Simulation of Asymmetric ...

    2021-7-12 · An analytical model and a numerical model were developed in this study to simulate the asymmetric converging flow of gas under the drill bit for reverse circulation gas drilling. The two models were compared and applied to the evaluation of a drill bit structure design for bottom hole cleaning capacity of gas flow.

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  • Numerical Simulation of Capillary Tube for Selected ...

    2018-12-7 · References 1. Y. K. Prajapati, M. Pathak and M. K. Khan, Numerical investigation of refrigerant flow through an adiabaic Capillary tube, in Proc. ISHMT-ASME Heat and Mass Transfer Conference, Kharagpur, India (2013). Google Scholar; 2. R. Y. Li, S. Lin and Z. H. Chen, Numerical modeling of thermodynamic non-equilibrium flow of refrigerant through capillary tubes, ASHRAE …

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  • Comprehensive modeling study of ozonolysis of oleic acid ...

    2017-3-20 · During sample measurements, the flushing air flow was switched off and the aerosol diverted into the EESI source. This assured a constant flow of 1 L/min into the source was maintained at all times. Mass spectrometry measurements were made …

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  • Numerical Simulation of Air Flow during Air Sparging ...

    A 2D numerical model is used to modeling the movement of air during air sparging process for groundwater remediation. The zone of influence (ZOI) and the water saturation distribution can be obtained from the calculations. The results agree well with the centrifuge test data, indicating the two-phase flow model is reasonable for numerical simulation of air sparging process.

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  • The Study of Air Flow for Uniform Profile Numerical ...

    The Study of Air Flow for Uniform Profile Numerical Simulation and Influence Factors . XinLei Li . School of energy ,power and mechanical engineering,North China Electric Power University,Baoding 071000,China. [email protected] . Abstract: This article use Fluent to make numerical simulation of air flow for uniform and around airfoil profile.

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  • Numerical Simulation Flow and Temperature Fields of

    Fiber air dispersion system (FADS) is an advanced flexible ventilation terminal in ventilated areas. Its benefits are numerous, which are air diffusion without feeling, anti-condensation, easy cleaning and low cost etc. The technology of computational fluid dynamics (CFD) was used in this paper. At first, a physical model of the environment conditioned by FADS was built.

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  • Numerical simulation of air–water flow in gated tunnels ...

    2020-1-22 · Numerical simulation of air–water flow in gated tunnels Open PDF. Proceedings of the Institution of Civil Engineers - Water Management. ISSN 1741-7589 | E-ISSN 1751-7729. Volume 163 Issue 6, June 2010, pp. 289-295. Prev Next > Numerical simulation of air–water flow in gated tunnels ...

    Get Price
  • NUMERICAL SIMULATION OF KEROSENE JET IN

    ABSTRACT. The liquid jet penetration, breakup, and spray evaporation in crossflows, which find their importance in aeroegines, are investigated in the steady and oscillating air-crossflows using detailed numerical simulation to improve the understanding of the influence of the inflow oscillation that is commonly caused by the combustion instability on this complex process.

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  • Numerical Simulation of Microscale Ion-Driven Air Flow ...

    2008-5-12 · Ion-driven air flow is a novel method of pumping air at microscale dimensions using the concept of ion drag. The method employs a series of micro-fabricated electrodes to generate strong electric fields that pump unipolar ions through air. Ions collide repeatedly with neutral molecules, thus generating bulk motion of the gas.

    Get Price
  • Effect of Airfoil Shape on the Aerodynamic performance

    2020-11-16 · The numerical simulation is performed with a two-dimensional unsteady turbulent flow system. Governing equations are: Continuity equation: ∇ ∙(??⃗ )=0 ((1) Momentum equations: X -momentum equation: = (? ) +∇∙(? ?⃗ ) − ? + ? + ? temporal discretization schemes. These numerical (2)

    Get Price
  • Numerical Simulation of Liquid Water and Air Flow in ...

    2009-8-24 · Tabe, Y, Kibo, K, Kikuta, K, Chikahisa, T, & Kozakai, M. 'Numerical Simulation of Liquid Water and Air Flow in Separator-Channels in PEM Fuel Cell Using LBM.' Proceedings of the ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference.

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  • Numerical simulation of high inertial liquid-in-gas ...

    Aqueous microdroplet generation involving high inertial air flow inside a T-junction microchannel was studied numerically. The volume of fluid method was employed to track the interface between two immiscible fluids: water and air. The effects of high inertial air flow …

    Get Price