Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: January 2013
Authors: Nan Geng
If you want to calculate the structure of the accurate wind load, need to undertake building wind tunnel test, or simulate the structure of the wind load by using wind load CFD numerical.
If want to calculate the the accurate wind load of structure, need to undertake building wind tunnel test, or use wind load CFD numerical simulation the structure of the wind load.
If want to calculate the the accurate wind load of structure, need to undertake building wind tunnel test, or use wind load CFD numerical simulation the structure of the wind load.
Online since: July 2013
Authors: Gang Wang, Yu Liu, Xiao Jiao Li, Feng Feng, Yu Juan Wang, Sheng Huang
Therefore, we can say that this domain has an excellent grid partition that can ensure the calculation precision of CFD.
Numerical Simulation of Viscous Flow around Three-Dimensional Hull by CFD [J].
Numerical Simulation of Viscous Flow around Three-Dimensional Hull by CFD [J].
Online since: March 2019
Authors: Phu Khanh Nguyen, Thi Kim Dung Hoang, Ngoc Khanh Tran, Van Khang Nguyen, Van Quang Dao
In this research, it used only numerical methods, which was based on CFD methods using ANSYS/FLUENT software.
Delta wing model Delta wing model was meshed by ICEM-CFD tool in ANSYS/FLUENT software, which was very power meshing tool which specifically blocking a computational domain, was used to mesh computational domain of all cases Delta wings (Fig. 2, Fig. 3).
R., “Compact Difference Scheme Applied to Simulation of Low-Sweep Delta Wing Flow,” AIAA Journal, Vol. 43, No. 8, 2005, pp. 1744–1752
Delta wing model Delta wing model was meshed by ICEM-CFD tool in ANSYS/FLUENT software, which was very power meshing tool which specifically blocking a computational domain, was used to mesh computational domain of all cases Delta wings (Fig. 2, Fig. 3).
R., “Compact Difference Scheme Applied to Simulation of Low-Sweep Delta Wing Flow,” AIAA Journal, Vol. 43, No. 8, 2005, pp. 1744–1752
Online since: September 2016
Authors: Derek W. Bassett, Gregory P. Thomes, Jeffery W. Butterbaugh, Chimaobi Mbanaso, David Scott Becker, Wallace P. Printz, Brent D. Schwab, Christina Ann Rathman, Jeffrey M. Lauerhaas, Antonio L.P. Rotondaro
Key process parameters such as temperature, pressure and density were extracted from fluid dynamic simulations using a commercial computation fluid dynamics (CFD) software package [8].
[8] Computational fluid dynamics (CFD) software information http://www.cd-adapco.com/ [9] S.H.
[8] Computational fluid dynamics (CFD) software information http://www.cd-adapco.com/ [9] S.H.
Online since: October 2013
Authors: Jiang Rong Xu, Ning Ding, Hao Wang, Yan Fang Zhang
Analysis of the meshless method numerical simulation results
The following numerical examples are used to analyze the results of the numerical simulation, in which the average error of the nodes value are mainly analyzed.
Besides, with the increasing of the influence domain radius, the simulation accuracy of m=2 and m=0 is improving, which describe that the size of the influence domain directly affects the accuracy of the simulation results.
Fig.3 shows the influence of the influence domain radius to the simulation results when the integral domain radius is 0.16667 and N=100.
Therefore, the influence domain increasing makes the average error to be stable. 2.4 The simulation of two-dimensional Poisson equation with derivative boundary condition using RPIM method (1) The simulation equation of the example is the same as 2.3, the numerical analysis is shown in Fig.4.
Liu, A parallelized meshfree method with boundary enrichment for largescale CFD, Journal of Computational Physics, 176(2002), pp. 483-506
Besides, with the increasing of the influence domain radius, the simulation accuracy of m=2 and m=0 is improving, which describe that the size of the influence domain directly affects the accuracy of the simulation results.
Fig.3 shows the influence of the influence domain radius to the simulation results when the integral domain radius is 0.16667 and N=100.
Therefore, the influence domain increasing makes the average error to be stable. 2.4 The simulation of two-dimensional Poisson equation with derivative boundary condition using RPIM method (1) The simulation equation of the example is the same as 2.3, the numerical analysis is shown in Fig.4.
Liu, A parallelized meshfree method with boundary enrichment for largescale CFD, Journal of Computational Physics, 176(2002), pp. 483-506
Online since: February 2012
Authors: Zhi Xia He, Tie Min Xuan, Zhao Chen Jiang, Yi Yan
Numerical Investigation of Effect Pilot Injection on Combustion Noise and Exhaust Emission of Diesel Engine
Tiemin Xuan a, Zhixia Heb , Zhaochen Jiang and Yi Yan
School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China
axuantiemin@163.com, bzxhe@ujs.edu.cn
Keywords: diesel engine, fuel injection strategy, combustion noise, exhaust emission, numerical simulation
Abstract.
Because of the symmetrical location of the injector at the center of the combustion chamber, the CFD calculations were performed with the mesh of 45ºCA sector meshes.
Calculations begin at Intake Valve Closure (218.5ºCA) and end at Exhaust Valve Opening (483ºCA) .The final mesh consists of a hexahedral dominated mesh shown as Fig. 1 Table 1 Engine specifications Engine type 1015 diesel engine Bore×stroke 132mm×145mm Compression Ratio 17 Connection rod length 262mm Engine speed 2100r/min Number of nozzle holes 8 Nozzle hole diameter 0.23mm Start of injection 350ºCA Fuel injected 180mg/cycle Injection pressure 90MPa Fig.1 The mesh of combustion chamber Fig.2 The comparison of pressure between experiment and simulation Calculating models.
The rate of pressure rise, temperature in cylinder, and Soot emission got from simulation for different injection strategies are given in Fig.3, Fig.4, Fig.5 respectively.
[3] Weisheng Zhu: Simulation of the Influence of Pilot Injection and Post Injection on the Combustion and Emission of Diesel Engine [D]. 2009.12 [4] Hyun Kyu Suh, Investigations of multiple injection strategies for the improvement of combustion and exhaust emissions characteristics in a low compression ratio (CR) engine.
Because of the symmetrical location of the injector at the center of the combustion chamber, the CFD calculations were performed with the mesh of 45ºCA sector meshes.
Calculations begin at Intake Valve Closure (218.5ºCA) and end at Exhaust Valve Opening (483ºCA) .The final mesh consists of a hexahedral dominated mesh shown as Fig. 1 Table 1 Engine specifications Engine type 1015 diesel engine Bore×stroke 132mm×145mm Compression Ratio 17 Connection rod length 262mm Engine speed 2100r/min Number of nozzle holes 8 Nozzle hole diameter 0.23mm Start of injection 350ºCA Fuel injected 180mg/cycle Injection pressure 90MPa Fig.1 The mesh of combustion chamber Fig.2 The comparison of pressure between experiment and simulation Calculating models.
The rate of pressure rise, temperature in cylinder, and Soot emission got from simulation for different injection strategies are given in Fig.3, Fig.4, Fig.5 respectively.
[3] Weisheng Zhu: Simulation of the Influence of Pilot Injection and Post Injection on the Combustion and Emission of Diesel Engine [D]. 2009.12 [4] Hyun Kyu Suh, Investigations of multiple injection strategies for the improvement of combustion and exhaust emissions characteristics in a low compression ratio (CR) engine.
Online since: August 2015
Authors: M.R. Thansekhar, M. Satheeshkumar, C. Anbu Meenakshi
A numerical simulation is carried out to minimize the flow maldistribution inside the microchannel.
From the simulation results it was found that the mal-distribution is significantly affected by flow rate and shape of the header.
In the numerical simulation, it is identified that CFD is a suitable tool for predicting the flow distribution and for optimizing the design of the microchannel.
Shuaib, Numerical simulation of heat transfer in wavy microchannel heat sink, International Communications in Heat and Mass Transfer. 38 (2011) 63-68
From the simulation results it was found that the mal-distribution is significantly affected by flow rate and shape of the header.
In the numerical simulation, it is identified that CFD is a suitable tool for predicting the flow distribution and for optimizing the design of the microchannel.
Shuaib, Numerical simulation of heat transfer in wavy microchannel heat sink, International Communications in Heat and Mass Transfer. 38 (2011) 63-68
Online since: May 2015
Authors: Tao Chen, Shi Bing Liu, Chong Zheng, Cui Yan Guo, Jing Wei Xue
Numerical simulation of the water transportation process in xylem is studied based on Ansys 12.0/fluent.
A 3-dimensional model for the flow field was then established, and the steady state flow was simulated with the computational fluid dynamics (CFD) software based on Navier-Stokes equations.
Simulation of 5 pits vessel element with different pits’ diameters.
Simulation of 10 pits vessel element.
Simulation of 20 pits vessel element.
A 3-dimensional model for the flow field was then established, and the steady state flow was simulated with the computational fluid dynamics (CFD) software based on Navier-Stokes equations.
Simulation of 5 pits vessel element with different pits’ diameters.
Simulation of 10 pits vessel element.
Simulation of 20 pits vessel element.
Online since: February 2014
Authors: Mu Qing Yang, Yu Hang Qiao, Dong Li Ma
Therefore, in this paper XFOIL was used to design preliminary airfoil, and then CFD tools were used to optimize and validate the airfoil.
However, accurate derivate can only achieved from CFD or wind tunnel, which have the disadvantage of intensive-calculation, high-cost, long-cycle, and aren’t fit for using in general design.
Numerical simulation of laminar separation bubble over 2D airfoil at low Reynolds number.
However, accurate derivate can only achieved from CFD or wind tunnel, which have the disadvantage of intensive-calculation, high-cost, long-cycle, and aren’t fit for using in general design.
Numerical simulation of laminar separation bubble over 2D airfoil at low Reynolds number.