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In current research, Computational simulation using CFD (Computational Fluid Dynamics) is performed with RANSE code in order to obtain catamaran performance in resistance.
Therefore, the accuracy of CFD for Semi-SWATH is analyzed by comparing the simulation result with experimental result in both catamaran and SWATH mode.
CFD application is widely used in resistance and wave profile prediction of ship.
CFD computational domain for Semi-SWATH CFX Numerical Simulation CFX is one of software capable in calculating ship resistance.
The simulation result shows that the CFD method applied is acceptable in predicting resistance values.

The influence of cross angle on the flow ripple of axial piston pumps by CFD simulation Wei Xiuye 1, a, Wang Haiyan 1, b 1 (School of Mechanical Engineering and Automation, North University of China, Taiyuan, 030051, China aweixiuye@163.com, b895885372@qq.com Keywords: Axial piston pump; Flow ripple; Cross angle; CFD simulation Abstract.
This paper studies the flow pulsation of axial piston pumps of different cross angles based on CFD simulation.
First, we established the flow pulsation model with swash plate cross angle based on the noise reduction principle of the swash plate cross angle, and studied the influence of cross angle of different rotation angels on the flow pulsation based on CFD simulation.
Fig.1Relationship of swash-plate angle and cross angle Fig.2 Comparison of a single piston flow rate with different rotation direction of cross angle The study based on CFD simulation Setup of the simulation parameters The correct model can not do without a reasonable setup of boundary conditions.
Axial piston pump grooved slipper analysis by CFD simulation of three-dimensionalNVS equation in cylindrical coordinates.

3D Simulation of flow in an Aeration Tank with two pipelines by a two-fluid model W.L.
Even biokinetic models have been successfully incorporated in CFD simulations (Le Moullec et al., 2010; Zima et al., 2009).
Oxygen transfer prediction in aeration tanks using CFD.
CFD simulation of the hydrodynamics and reactions in an activated sludge channel reactor of wastewater treatment.Chemical Engineering Science 65 (1), (2010 ),p492-498
Two- and three-dimensional simulations of a bubble plume using a two-fluid model.

A numerical simulation of VOCs distribution in indoor environment of a dormitory Bin Sun1,a, Zhihui Yang2,b 1Northest Dianli University Ji Lin City, China 2Northest Dianli University Ji Lin City, China aemail:sunbin@mail.nedu.edu.cn, bemail:happylala0621@126.com Keywords: Indoor environmental; pollutant concentration; CFD simulation; VOCs Abstract: This document utilizes CFD simulation method to confirm the distribution of a new dormitory under the condition of natural ventilation and get the visible result and analyses the result of simulation and monitor.
By use of CFD simulation method the detailed result of indoor velocity field and pollutant concentration can be get easily.
It drives the CFD technology come out and The model establishment and initial condition confirmation Establish the mathematical model.
Analysis the simulation result To make a numerical simulation is based on the critical room.
The Analysis of Computation Fluid Dynamic-The Principle and Application of CFD, Republic of Tsinghua University (2004)

Then unsteady CFD simulation with different time step intervals was conducted for determining suitable time step interval, the results show that it is suitable for propeller rotating 3° per step.
Based on the chosen mesh and time step interval, unsteady CFD simulation of propeller P4118 was conducted in 3-cycle and 4-cycle inflow, the unsteady thrust, torque and horizontal force agree well with experimental data, the results show that CFD method has good accuracy in predicting unsteady propeller forces.
The numerical simulations are based on RANS equations closed by realizable k-ε model.
Therefore, CFD method gives good enough accuracy for propeller open water simulation.
Based on the chosen mesh and the time step interval, for P4118 unsteady CFD simulation in 3-cycle inflow and 4-cycle inflow, the unsteady thrust, torque and horizontal force agree well with experimental data and this means CFD has a good capability of predicting propeller unsteady performance.

CFD Simulation of Different Flow Regimes of the Spout Fluidized Bed with Draft Plates Bruna Sene Alves Araújo1,a, Kássia Graciele dos Santos1,b 1 UFTM- Av.
The objective of this work is to study the fluid dynamics of a spouted fluidized bed through simulations using CFD technique.
CFD simulations were performed in the commercial software Fluent, while the computational grid was built using the software Gambit.
CFD simulations of Spout Fluidized bed with draft plates.
Table 1 – Different flow regimes studied by CFD simulations.

CFD Simulation of an Airlift-driven Raceway Bioreactor for Microalgae Cultivation Weng Bin1, Shen Ying1, a, Chen Jiacheng1, Li Huabiao1, Liu Luming1, Deng Baocheng1, Huang Gengbin1 1College of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, Fujian, 350116, China ayshen@fzu.edu.cn Keywords: computational fluid dynamics (CFD); microalgae; airlift bioreactor; velocity distrubution Abstract: The objective of this paper is to optimize the design and structure of an airlift-driven raceway bioreactor via the computational fluid dynamics (CFD) simulation for microalgae cultivation.
Introduction Nowadays, computational fluid dynamics (CFD) has emerged as a powerful tool for simulation of flow behavior.
Luo et al. [4] attemptted to evaluate the reliability of using CFD simulations to generate trajectories of microorganisms in a draft tube column photo-bioreactor.
The quality of grids is very important to the computational fluid dynamics simulation.
The results showed that the ability of CFD to gain new insights in the bioreactor design.

Present work deals with the optimization for flow pattern of continuous phase in a sieve plate extraction column using both computational fluid dynamics (CFD) simulations and particle image velocimetry (PIV) measurements.
The comparison of CFD and PIV results showed that adding a gap between doughnut edge and column wall can improve the predictability of the simulation.
The group of Bart [5, 6] conducted single-phase flow and two-phase flow CFD simulation and PIV experiment to study two RDCs of 150 mm and 450 mm inner diameter respectively.
Fig. 8 showed the flow patterns derived from PIV measurement and CFD simulation at the water rate of 0.381m3/h.
Both CFD simulation and PIV measurement results consistently showed that in TSPEC, there was a large backflow area between every two plates; however, in MSPECs backflow area gradually reduced.

Experimental Investigation and CFD Simulation of Removal Characteristics in Nanoparticle Colloid Jet Machining Xiaozong Song1,a , Yong Zhangb, Feihu Zhangc and Dianrong Luan 1 School of Mechatronics Engineering, Harbin Institute of Technology, Harbin, China a songxiaozong@126.com, bhit_zy@yahoo.com.cn, czhangfh@hit.edu.cn Keywords: Ultra smooth surface, Nanoparticle colloid jet, Submerged jet, Computational fluid dynamics Abstract.
The corresponding material removal experiments in nanoparticle colloid jet machining have been done to validate the rationality of the CFD model.
(a) (b) Fig.1 The schematic photograph of the nanoparticle colloid jet machining system Computational Fluid Dynamics Simulation of anoparticle Colloid Jet In this study, the process of nanoparticle colloid jet are investigated using incompressible flow type CFD with the conventional k-ε turbulence model.
According to the CFD simulation result of axial velocity distribution, vertical ( 0θ= ° ) and aslant ( 60θ= ° ) jet impingements CFD were done at a distance of 5d away from the nozzle exit in both cases, and the diameter simulation jet interaction region is 10d, where d is the width or the diameter of the nozzles.
According to the above simulation results, corresponding experiments were done with two impact angles: 0°and 60°.

A simplification method is used during the simulation process to solve the difficulty of model building during the simulation of the mist pad.
After CFD simulation, model experiment study is carried on using a small scale wind-tunnel.
The pressure drop is gained to testify the numerical simulation result.
Abbaspour etc used CFD method to predict pressure drop of mesh mist eliminator with a large number of mesh grid more than 100,000,000[1].It is good to insists that CFD simulation for demister pad causes difficulty because of tiny diameter of wire mesh and it is so hard to simulate because of limitation of computing and in some cases complex structure of wire meshes.
Abbaspour: Determination of pressure drop in wire mesh mist eliminator by CFD.