scholarly journals Viscous flow simulation of a two-dimensional channel flow with complex geometry using the grid-particle vortex method

1999 ◽  
Vol 7 ◽  
pp. 215-224 ◽  
Author(s):  
Henryk Kudela
Keyword(s):  
Viscous Flow ◽  
Channel Flow ◽  
Complex Geometry ◽  
Flow Simulation ◽  
Vortex Method ◽  
Two Dimensional

Two-dimensional turbulent viscous flow simulation past airfoils at fixed incidence

1997 ◽  
Vol 26 (2) ◽  
pp. 135-162 ◽  
Author(s):  
E. Guilmineau ◽  
J. Piquet ◽  
P. Queutey
Keyword(s):  
Viscous Flow ◽  
Flow Simulation ◽  
Two Dimensional

scholarly journals Two-dimensional viscous flow simulation of a shock accelerated heavy gas cylinder

2011 ◽  
Vol 23 (2) ◽  
pp. 024102 ◽  
Author(s):  
Santhosh K. Shankar ◽  
Soshi Kawai ◽  
Sanjiva K. Lele
Keyword(s):  
Viscous Flow ◽  
Flow Simulation ◽  
Two Dimensional ◽  
Gas Cylinder ◽  
Heavy Gas

Two-dimensional nonsteady viscous flow simulation on the Navier-Stokes Computer miniNode

1986 ◽  
Vol 1 (1) ◽  
pp. 53-73 ◽  
Author(s):  
Daniel M. Nosenchuck ◽  
Michael G. Littman ◽  
William Flannery
Keyword(s):  
Viscous Flow ◽  
Flow Simulation ◽  
Navier Stokes ◽  
Two Dimensional

Comparison of DSMC and CFD Models of Heat Transfer in a Rarefied Two-Dimensional Geometry

2018 ◽  
Author(s):  
Dilesh Maharjan ◽  
Mustafa Hadj-Nacer ◽  
Miles Greiner ◽  
Stefan K. Stefanov
Keyword(s):  
Heat Transfer ◽  
Rarefied Gas ◽  
Complex Geometry ◽  
Direct Simulation Monte Carlo ◽  
Accurate Method ◽  
Vacuum Drying ◽  
Helium Pressure ◽  
Two Dimensional ◽  
Dsmc Method ◽  
Cfd Simulations

During vacuum drying of used nuclear fuel (UNF) canisters, helium pressure is reduced to as low as 67 Pa to promote evaporation and removal of remaining water after draining process. At such low pressure, and considering the dimensions of the system, helium is mildly rarefied, which induces a thermal-resistance temperature-jump at gas–solid interfaces that contributes to the increase of cladding temperature. It is important to maintain the temperature of the cladding below roughly 400 °C to avoid radial hydride formation, which may cause cladding embrittlement during transportation and long-term storage. Direct Simulation Monte Carlo (DSMC) method is an accurate method to predict heat transfer and temperature under rarefied condition. However, it is not convenient for complex geometry like a UNF canister. Computational Fluid Dynamics (CFD) simulations are more convenient to apply but their accuracy for rarefied condition are not well established. This work seeks to validate the use of CFD simulations to model heat transfer through rarefied gas in simple two-dimensional geometry by comparing the results to the more accurate DSMC method. The geometry consists of a circular fuel rod centered inside a square cross-section enclosure filled with rarefied helium. The validated CFD model will be used later to accurately estimate the temperature of an UNF canister subjected to vacuum drying condition.

scholarly journals A Fast Two-Dimensional Numerical Method for the Wake Simulation of a Vertical Axis Wind Turbine

Energies ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 49
Author(s):  
Zheng Yuan ◽  
Jin Jiang ◽  
Jun Zang ◽  
Qihu Sheng ◽  
Ke Sun ◽  
...  
Keyword(s):  
Velocity Distribution ◽  
Numerical Method ◽  
Three Dimensional ◽  
Particle Method ◽  
Vortex Method ◽  
Vertical Axis ◽  
Two Dimensional ◽  
Vertical Axis Wind Turbine ◽  
Wake Effect ◽  
Array Design

In the array design of the vertical axis wind turbines (VAWT), the wake effect of the upstream VAWT on the downstream VAWT needs to be considered. In order to simulate the velocity distribution of a VAWT wake rapidly, a new two-dimensional numerical method is proposed, which can make the array design easier and faster. In this new approach, the finite vortex method and vortex particle method are combined to simulate the generation and evolution of the vortex, respectively, the fast multipole method (FMM) is used to accelerate the calculation. Based on a characteristic of the VAWT wake, that is, the velocity distribution can be fitted into a power-law function, a new correction model is introduced to correct the three-dimensional effect of the VAWT wake. Finally, the simulation results can be approximated to the published experimental results in the first-order. As a new numerical method to simulate the complex VAWT wake, this paper proves the feasibility of the method and makes a preliminary validation. This method is not used to simulate the complex three-dimensional turbulent evolution but to simulate the velocity distribution quickly and relatively accurately, which meets the requirement for rapid simulation in the preliminary array design.

scholarly journals Degeneracy of turbulent states in two-dimensional channel flow

2021 ◽  
Vol 917 ◽  
Author(s):  
Vilda K. Markeviciute ◽  
Rich R. Kerswell
Keyword(s):  
Channel Flow ◽  
Two Dimensional

Abstract

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