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Then the Centrifugal pump Hybrid Grid model was built with muti-block structure and octree style.The final structure parameters were obtained by CFD numerical simulation optimization.
The CFD model and grid model is shown in fig.4.
Fig.4 CFD model (left) and Hybrid Grid model (right) Performance simulation of the centrifugal pump Performance analysis on design point Get the main geometric parameters of centrifugal pump after several iterations of calculating results.
Considering the characters of this model pump, using the tradition method with empirical coefficients to do the preliminary design, and combining the computing CFD numerical simulation method better to modify the parameters and build the numerical model to optimize the design parameters of the centrifugal pump’s structure so that the design circle can be shortened effectively.
Computer Simulation,2011,28(1):84-87

Numerical simulation is an effective method for ice shape prediction based on CFD technology, which has been concerned for years in countries like the US, the UK, France and Canada[2~6].
The abovementioned aspects lead to large computational time for ice accretion simulation.
Predictions of a temperature at 257K and 262K are calculated and compared with CFD data.
Bu: Three-Dimensional Numerical Simulation of Ice Accretion at the Engine Inlet.
Habashi: Toward Real-Time Aero-Icing Simulation of Complete Aircraft via FENSAP-ICE.

An attempt of this simulation is to identify which type performs better in the same wind conditions and swept area.
Three-dimensional computational fluid dynamics (CFD) was adopted in this analysis, after solid models of them were generated.
An effort to make a comparison of straight-blade and twisted-blade VAWT about their aerodynamics and power output by CFD is conducted in this paper.
Numerical simulation Grid System Generation.
ICEM-CFD was adopted for unstructured mesh generation and solution was conducted in Fluent.

Numerical Simulation of Salt Particle - Supercritical Water Flow in a 90° Bend Pipe Yuzhen Wang1, a, Shuzhong Wang1, b, Yang Guo1, Donghai Xu1, Guangxin Yu2, Hang Yu2 and Jinpeng Sheng2 1Xi’an Jiaotong University, Suzhou Academy, Suzhou, Jiangsu, 215123, China 2CNOOC New Energy Investment Co., Ltd., Beijing, 100016, China awangyuzhen224@yahoo.com.cn, bs_z_wang@yahoo.cn Keywords: Numerical simulation, supercritical water, salt Abstract.
Simulation object and grid generation.
The present simulation results support that impinging velocity and particle number density are important parameters for particle–wall erosion prediction.
Conclusions DEM method coupled with computational fluid dynamics (CFD) was used to to describe the transport behavior of salt particle–supercritical water flow in a 90° bend pipe.
Yu, Numerical simulation of complex particle–fluid flows, Powder Technol. 179 (2008) 104-114.

Based on CFD software, three dimensional unsteady internal flow field numerical simulation of some type rotor oil pump is carried out.
And, the velocity and pressure simulation results at different speeds are obtained.
Based on acoustic finite element and infinite element method, CFD software and acoustic solver software are used to simulate the flow induced noise of rotor oil pump.
Calculate the spread of flowing sound source, and export value of the sound pressure level of monitoring points U Based on unsteady numerical simulation of CFD software, Results of pressure, velocity of unsteady flow are obtained.
Application of RNG model in numerical simulation of engineering turbulent flow[J].

In this paper, the steady state motion and performance of the gliding robot fish is investigated using CFD simulation.
Hydrodynamic Coefficients Based On CFD: The hydrodynamic coefficients were determined using a computational fluid dynamics (CFD) software package [11] by passing fluid over the gliding robotic fish.
Simulation Setup: For the CFD simulation, a solid 3D model of the gliding robotic fish was created using Solid-works software as shown in Fig. 3.
After defining the boundary condition, the lift, drag and moment coefficient were determined from CFD simulation, and are shown in Table 1.
The simulation results match the experimental results for wings with an aspect ratio of 1.6 and 2.9 respectively by Feitian et al. [3] as shown in Table 2.

The investigation was carried out utilizing computational fluid dynamics (CFD) simulations.
Computational Fluid Dynamics (CFD) simulations have demonstrated potential as a viable method for prognosticating system performance.
Yaseen et al. (2017) [4] presented a paper that used computational fluid dynamics (CFD) simulations to examine the thermal and fluid properties of three-layer microchannel heat sinks.
Simulations of computational fluid dynamics (CFD) were used to conduct the study.
Simulations of computational fluid dynamics (CFD) were used to carry out the study.

Research on the Natural Ventilation Cooling Effect of Residential Building Based on the CFD and DeST Simulation Lihua Zhao1,a , Cuicui Qin1, b 1Building Environment and Energy Laboratory (BEEL), State Key Laboratory of Subtropical Building Science, South China University of Technology, China, 510640 a lhzhao@scut.edu.cn, b cuicuiqin@foxmail.com Keywords：Natural ventilation, residential building, cooling, air change rates Abstract.
This paper presents a method, integrating simulation by both software of DeST-h and computational fluid dynamics (CFD) in typical meteorological year (TMY) in Guangzhou, to evaluate quantitatively the natural ventilation cooling effect.
Also, due to the lack of appropriate simulation tool predicting energy use of natural ventilated building is difficult.
In order to save the computer simulation time, a simulation method was pointed out, shown in the figure 2.
Figure 2 Simulation flowsheet A wind direction is set to a cycle, first take a wind direction and the wind speed V1 for simulation.

Based on the method of CFD, a study on the structure parameters that affect the performance of chevron-type corrugated plate were carried out by simulating with the CFD software Fluent.
CFD technology has made a milestone for the research of plate heat exchanger. 2D CFD simulations with depth-averaged equation as a fast modeling tool were used by comparing 30 different geometries, and conclusion was drawn that pressure drop is more sensitive for geometrical modifications as the temperature change [3].
Y Cai, et al [4] carried out simulation on the actual model at a workstation.
Numerical simulation methodology The mathematical modeling involves the prediction of flow and heat transfer behaviors.
“Computational Fluid Dynamics - CFD software Principle and Application,” Beijing: Tsinghua University Press .2004,pp :128-129.

Research Progress of Simulation on the Flow Field in Anaerobic Reactor Qin Zhang1, a, Qiang Li2, b and Jia Tang3,c 1Chongqing Municipal Environmental Monitoring Center, Ranjiaba flag Road No. 252, Yubei District, Chongqing city, 401147, China 2 Chongqing Academy of Environmental Sciences, Ranjiaba flag Road No. 252, Yubei District, Chongqing city, 401147, China 3 Chongqing University, Sand Road No. 83, Shapingba District, Chongqing city, 400045, China aemail：zhangqin918@126.com Keywords: Anaerobic Reactor, Flow Field, Numerical Simulation, CFD, Progress in the Research.
It is often studied by numerical simulation.
Computational fluid dynamics (CFD) is a numerical study flow method control in the flowing numerical simulation methods [3].
Fluent is the most popular commercial CFD software, to simulate the flow, heat transfer, and chemical reactions and other physical phenomena, is widely used in engineering.
CFD simulation of mechanical draft tube mixing in anaerobic digester tanks[J].Water Research, 2009 (43):1040-1050.