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Numerical Simulation and Optimization of Air Distribution in Large Space Zehang Du 1, a, Chunhua Liu 1, b and Guang Zhou2,c 1 College of Shipping and Ports Construction Engineering, Zhejiang Ocean University, ZhouShan, 316022, China 2Tianhe College of Guangdong Polytechnic Normal University, Guangzhou, 510540, China a2271354946@qq.com, bliuzi1001@163.com，czzzg2001@sina.com Keywords: Air distribution; Turbulence model; Numerical simulation; CFD; Hotel atrium Abstract.
Distribution of temperature, velocity on some typical section and the atrium space can be obtained; the result of numerical simulation can be visualized by post-processing module of FLUENT and TECPLOT software.
Numerical Simulation Physical Model The K-turbulence model, a common model in current studies, is used in the numerical simulation.
Simulation Calculations and Results Analysis Perform calculations on the above model, the results are shown in Figure.4-7: Figure.4.
CFD numerical simulation of air distribution and analysis of thermal comfortablity on delaminated air-conditioning system in a large space building.

By Computational Fluid Dynamics (shortened as CFD) method, the high relative speed motion model between the blade and air flow is established, the flow field through the blade tip section are simulated, and the instantaneous movement of air flow around the blade can be known.
Yu studied a single-deck mower, and designed the cutter suspension system, analyzed the cutter movement by Matlab software simulation [8].
The cutter deck and the blade are firstly designed, and then stimulated by Computational Fluid Dynamics (shortened as CFD) software called Fluent.
The same can be seen in the simulation, the vortex phenomenon occur close to the blade wall, and there is sudden drop trend for air flow rate, the grass clippings will pile up on the surface of the blade.
Modern computer simulation technology provides an opportunity for the study on commercial lawn mowing vehicle, at least they can provide reliable advice and methods for the production design and manufacturing.

The CFD analysis has been carried out in CFX software, which is available in ANSYS Workbench 14.In order to apply the spray of diesel fuel and air phases to the program, diesel fuel and air properties from the fuel library were used.
The nozzle geometry used in simulations is shown in Figure 1.
Isothermal conditions are assumed and the temperature used for the simulations was 25 oC.
Results and Discussion The CFD analyses for the three different air inlet conditions are discussed in this section in order to investigate the effects of utilizing different air pressures on mixing characteristics of diesel and air phases.
[10] Fridolin K., CFD for air induction systems with OpenFOAM, Msc.

All these computational process is carried on by CFD commercial code FLUENT 6.3.
Validation of Simulation Results Fig. 6.
Fig. 6 shows that the results of 3D numerical simulation and the experiment are closer, however 2D numerical simulation results are still in the range which is allowed in engineering and 2D simulation also has economical cost.
Summary 2D and 3D numerical simulation by commercial CFD code FLUENT 6.3 of different inlet velocity is performed and resistant characteristic experiment is carried out. 2D and 3D numerical simulation results agree well with data of resistant characteristic experiment and multipoint pressure measurement.
The Numerical Simulation of Marine Moisture Separators.

The ways to study the forces of tube in process of sinking mainly take means of test and numerical simulation.
Scholars have done the appropriate research on such problems, Zan Dexin[5] had created the numerical simulation of the floating and sinking of tube, and analysed the theory on tube segment sinking.
The numerical model simulate the process of tube sinking, which is relied on the Guangzhou Zhoutouzui immersed tube tunnel, based on RNG k-ε turbulence model, used the Computational Fluid Dynamic (CFD) method.
Numerical simulation of immersed tube sinking The numerical model The sinking speed of tube segment is 0.5m/min, the distance from the water surface to trench bottom is 9.56m.
Conclusions It have simulated the process of tube of immersed tube tunnel sinking using CFD method, obtained the following conclusions.

A three-dimensional model of a full-sized diesel SNCR system generated by CFD software FIRE is used to investigate the reduction efficiency under different temperatures.
Therefore this numerical simulation with CFD software (FIRE 2009) is introduced to investigate the performance of SNCR system.
And the simulation injection point agrees with position A.
The simulation results are slightly lower than the experimental results, because simulation lacks a reaction process before mixture flows across the sncr-inlet cross section.
The simulation results are in good agreement with the experimental results, and simulation method can be used to further optimize SNCR system.

The fluid domain model of a new oil-air distributor in oil-air lubrication system is built and the phase distribution of oil and air two-phase flow on distribution interfaces is simulated based on the CFD model in Fluent, the mass flow rate of oil and air are collected from three different cross sections when the structures of fluid guidance slot are designed as a plane, sphere and cone shape respectively, then the influence of oil-air guidance slot structure on the performance of distributor is analyzed in the oil-air lubrication system in this paper.
The working principle and simulation model of oil-air distributor The improved oil-air distributor structure is shown in Fig. 1.
Results and discussion In simulation we set that, air density is 1.225and viscosity is ; oil density is 890and viscosity is , in the turbulence model, set ，，，，，.
Conclusion (1) CFD simulation models of the improved oil-air distributor is built, the oil and air distributions of three different oil-air distributors whose oil-air guidance slot are designed as a plane, sphere, and cone have been simulated respectively
Structure Design and Performance Simulation of the Oil-air Distributor[D].

EffectofT-shaped Micro-channel StructureDimension onFormation ofMicro-liquid-columns Formed by Vertical-shear-flow WANG Zhixin1,a, Li zhe2,b, Cai hengzhi2,b, ZHANG Yajun1,c, ZHUANG Jian*3,d 1College of Mechanical and Electrical Engineering, Beijing University of Chemical and Technology,Beijing, China,100029; 2L.K.Group Ningbo L.K. technology Co.Ltd; 18 Yanshanhebeilu, Ningbo, Zhejiang, China, 315806; 3Engineering Research Center of Polymer Processing Equipment of Beijing University of Chemical and Technology, Ministry of Education, Beijing, China,100029 axiaoxin871205@163.com, blknblk@lknblk.com,ca1169@163.com, dvipzhuangjian@163.com Key words: Micro-reactors; Micro-channels; CFD; Vertical-shear-flow; Micro-liquid-columns Abstract：Effects of T-shaped micro-channel structuresizes on the formation of micro-liquid column formedby vertical-shear-flow were studied.
The method of CFD based on VOF (Volume of Fluid) model was used in the computation.
Using the method of CFD, Dong Lichun[3]simulated the regular of micro-droplets formation in a T-shaped micro-channel, studied the effect of the Capillary number on the regular.
continuous-phase inlet mian channel dispersed-phase inlet (a)3D model (b)2D model Fig.1 Geometric model of T-shaped micro-channel In order to simulate the formation of micro-liquid-columns in the T-shaped micro-channel, the CFD method based on VOF model in the software of Fluentis used.
CFD simulation of droplet formation in a microfluidic T-junction[J].

A comparison on the combustion process and characteristic of conventional HBS and HTAC HBS is performed by application of Computational Fluid Dynamics (CFD) simulation model.
CFD Study of HTAC HBS In order to study the combustion features of HATC stove, the physical models of normal dome combustion stove and HTAC stove, as well as mathematic model of turbulent combustion are established.
The temperature distribution, concentration distribution and formation amount of NOx are studied by CFD simulation method.
The combustion characteristics of HTAC stove is studied by simulations of convention dome combustion stove and HTAC stove respectively.
Numerical simulation on influence factors of NOx emissions for pulverized coal boiler.

Thus, Static Simulation software is essential in the industry [8].
Static Simulation Structural integrity was evaluated through static simulations using SolidWorks Simulation software.
However, quantitative thermal performance analysis and computational fluid dynamics (CFD) simulations are recommended to validate the effectiveness of ventilation holes and overall thermal management strategies explicitly.
Placement of ventilation holes, as currently designed, will be validated using CFD tools to ensure proper heat dissipation, particularly in wall-mounted scenarios.
While simulation results support structural robustness and theoretical thermal management capabilities, additional quantitative thermal analyses, CFD validations, practical mounting details, and clear references to industry standards compliance are necessary for comprehensive validation and industry readiness.