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FLOW CHARACTERISTICS STUDY IN KITCHEN HOOD USING ANSYS Mohamad Rasidi bin Pairan1,a *, Norzelawati Binti Asmuin2,b, Z.A.Muni3,c, M.H.M.Kassim4,d, M.F.Sies5,e 1, 2, 3, 4, 5 Centre for Energy and Environmental Study (CEIES), Faculty of Mechanical and Manufacturing Engineering Universiti Tun Hussein Onn Malaysia, Parit Raja, 86400 Batu Pahat, Johor, Malaysia auncle_sid@yahoo.com.my, bNorzela@uthm.edu.my, c zaey_zack@yahoo.com, dmhasyiemcity@gmail.com, efarids@uthm.edu.my Keywords: Commercial Kitchen Hood, Flow Characteristics, Capture Jet Technology, Kitchen Space, CFD.
The turbulent model for this simulation is Re-Normalization Group (RNG) k-ε.
The RNG k-epsilon has been selected in this simulation because it suitable to study the flow characteristics in the kitchen hood and useful to analyse the interior of the region.

Rao et al. [7] performed numerical simulations of laminar flow of shear-thinning fluids modeled by the power-law model across elliptical section tubes.
In the present work, the heat transfer from elliptical section tubes arranged in a row to viscoplastic fluids in cross flow is investigated using computational fluid dynamics (CFD).
The measure of heat transfer provided in each case is given by the average Nusselt number based on the square root of the ellipse area, defined as , (10) where qw is the heat transfer rate of the tube wall, Le Is the ellipse perimeter calculated as [18] , (11) where e is the ellipse eccentricity, calculated as (12) For the numerical solution, the CFD ANSYS/FLUENT software was used.
In this work numerical simulations were carried out with meshes of different degrees of refinement and the obtained solutions were compared.
“Numerical simulation and global linear stability analysis of low-Re past a heated circular cylinder.”

Heat Dissipation Capacity of Heat Sink Assembly with/without Vortex Generators Sheam-Chyun Lin1,a,Cheng-Ju Chang1,b, Fu-Yin Wang1,c, Horng-Ching Hsiao1,d Shiuh‐Kuang Yang2,e, Chun-Yu Hsiao1,f 1National Taiwan University of Science and Technology, Taipei, Taiwan 2National Sun Yat-Sen University, Kaohsiung, Taiwan asclynn@mail.ntust.edu.tw, bD9603301@mail.ntust.edu.tw, cD9703302@mail.ntust.edu.tw, dhsiao@ee.ntust.edu.tw,eskyang@mail.nsysu.edu.tw, fD9607101@mail.ntust.edu.tw Keywords: Vortex generators, Heat sink assembly, Numerical simulation, Thermal resistance Abstract.
In this research, numerical simulation is adopted to study the cooling characteristic of a bracket-type heat sink assembly.
As a result, the numerical simulations show thatapparent reductions on source temperature (from 348.0K to 346.2K) and thermal resistance (from 0.266 K/W to 0.253 K/W) are observed for a 150W power input.
The winglet vortexis placed in front of 3X5 modules with a 20° attack angle to enhance heat transfer coefficients, reduce thermal wake and module temperatures significantly.Leu et al.[5] used CFD and test meansto analyze heat transfer and flow field in the plate-fin and tube heat exchangers equippedwith vortex generators.
Numerical results of prototype CPU air cooler In this research, numerical simulation is adopted to analyze the heat dissipation capacity of prototype heat sink assembly (Fig. 1) under the high power input, say 150W.

The third one is simulation and discussion.
Simulation and Discussion We use ESI-CFD+ software package for simulation.
As in Figs. 4(a) and 4(b) for the geometric dimensions of hemi-spherical and square chambers, the thermal sensors can be put at either one of the three points to be trade-off by simulation.

The external wall and window’s heat load ratio to the total heat load case case 1 case 2 case 3 case 4 case 5 the external wall heat load ratio 20% 30% 40% 50% 60% the external window’s heat load ratio 80% 70% 60% 50% 40% Simulations The physical model.
The room space used in the CFD is 5.0 m in length, 4.0 m in width and 3.0 m in height.
This model is popular in industrial flow and heat transfer simulations because it is robustness, economy, and reasonable accuracy for a wide range of turbulent.
The simulation boundary conditions.
The parameter result of the different case case case 1 case 2 case 3 case 4 case 5 the total heating load (w) 407 407 407 407 407 the heat load of the external wall (w) 81.4 122.1 162.8 203.5 244.2 the heat load of the external window (w) 325.6 284.9 244.2 203.5 162.8 the external wall’s heat transfer coefficient (w/m2·k) 0.383 0.575 0.766 0.958 1.149 the external window’s heat transfer coefficient (w/m2·k) 3.261 2.853 2.446 2.038 1.631 the internal surface temperature of the external wall (˚C) 16.86 16.28 15.71 15.14 14.57 the internal surface temperature of the external window (˚C) 8.25 9.47 10.69 11.91 13.13 the supply-return heat water mean temperature (˚C) 52.59 52.59 52.59 52.59 52.59 The simulation results.

A concise numerical model of gas-liquid stratified wavy flow LI Guozhen1,a,Yuan Yalei2,b 1China University of Petroleum,Beijing 102249,China 2Beijing Petroleum Machinery Factory,100083, China a guozhenli76@163.com, b kuku935@sohu.com Keywords: gas-liquid flow；stratified wavy flow；closure laws; numerical simulation Abstract.
Nigam: CFD modeling of flow profiles and interfacial phenomena Chemical Engineering and Processing 2006,45 : 55–65 [10] Gada, VH ,Sharma: A Analytical and level-set method based numerical study on oil-water smooth/wavy stratified-flow in an inclined plane-channel Int.J.Multiphase Flow, 2012; 38(1): 99-117 [11] Wang linlin,Tian hui,Li Guojun: Numeical simulation of oil-water and air-water two-phase flow based on level-set methods.

A geometric model and finite element grid model of JQ40A gasoline engine turbocharger were set up based on the CFD software NUMECA.
Compressor Impeller Strength Simulation Stress Analysis and Deformation Analysis of the Compressor Impeller.
Fig.4 Turbine structural design scheme (a) (b) Fig.5 Turbo stress simulation (a) (b) Modal Analysis of Turbine Blades.
Numerical Simulations of Stall inside a Centrifugal Compressor [J].
Numerical simulation of the flow field in diesel engine exhaust manifold based on FLENT[J].

In this study, we valid and apply a multi-function CFD (computational fluid dynamics) model we have recently developed to simulate the propagation and breaking of offshore waves, as well as their impacts on costal structures.
The simulation is continued for 6s with an automatically adapted time step using maximum CFL-numbers of 0.75.
Simulations were carried out to predict the breaking pattern for different seabed slopes and wave heights.
From numerical simulations conducted in this study, we have got the major understanding as follows. 1.
References [1] K.M.T Kleefsman, G.Fekken, A Volume-of-Fluid based simulation method for wave impact problems, J.

While the numerical simulation be of economy, flexibility and widely applied in parachute research.
The representative researches are: Purvis simplified the structure, flow field model and the result of two-dimensional is obtained, but the numerical model used in his calculation is rough and sensitive to damping coefficient; In 1993, Benny and Stein proposed the CFD/MSD (Mass Spring Damper) coupling model, which ignore the influence of fabric characteristics, and the research result had no test to verified; Since 2005, Benjamin based on ALE simulated the three-dimensional parachute opening process, and the results are verified by test [2].
Fig. 3 Comparison between simulation and experiment Calculation Analysis The dynamic results in parachute inflating, including equivalent stress, flow velocity and pressure, are shown in Fig. 4.

China aglhu2006@163.com, bhamtz123@163.com, cjuxxi741@126.com Keywords: Liquamatic fire water monitor, Self-swinging, Structural parameters, Flow field simulation, Jet characteristics.
These simulation results will provide useful theoretical guidance for design of other types of fire water monitor.
The opening of nozzle can be adjusted by a handle operation, which can determine direct jet or spray jet. 1.monitor head 2.handle operation device 3.outlet pipe 4.location and locking device 5.inlet pipe 6.connecting rod 7.disk drive 8.bevel gear 9.driven shell 10.impeller 11.monitor feet 12.monitor base 13.feet mechanism Fig. 1 Structure of the liquamatic fire water monitor with self-swinging device Simulation Analysis of Structural Parameters on Jet Characteristics Fluent software, as one of the general CFD softwares, is used to simulate complex flow, ranging from incompressible fluid to highly compressible fluid [4].
Fig. 2 Circular flow channel model Fig. 3 Square flow channel model Fig. 4 and Fig. 5 show the velocity flow simulation under different cross-sectional shape of the monitor body.
(a) d=60mm (b) d=65mm Fig. 8 Velocity flow in the bent pipe Fig. 8 shows the velocity flow simulation at diameter of 60mm and 65mm in the bent pipe.