LES of the flow past a rectangular cylinder using the immersed boundary concept

2003 ◽  
Vol 41 (6) ◽  
pp. 615-632 ◽  
Author(s):  
D. G. E. Grigoriadis ◽  
J. G. Bartzis ◽  
A. Goulas
Keyword(s):  
Immersed Boundary ◽  
Rectangular Cylinder ◽  
Flow Past

Influence of Rounded Corners on Flow Interference Due to Square Cylinders Using Immersed Boundary Method

2012 ◽  
Vol 134 (9) ◽  
Author(s):  
M. B. Shyam Kumar ◽  
S. Vengadesan
Keyword(s):  
Immersed Boundary Method ◽  
Bluff Body ◽  
Immersed Boundary ◽  
Drag Coefficients ◽  
Square Cylinders ◽  
Flow Past ◽  
Corner Radius ◽  
Boundary Method ◽  
Lift And Drag ◽  
Flow Interference

The influence of rounded corners on the aerodynamic forces and flow interference has been studied in detail for a uniform flow past two side-by-side arranged square cylinders. The Reynolds number (Re) based on the cylinder diameter (D) and free stream velocity (U∞) is 100. Numerical simulations are carried out for seven different transverse gap ratios (T/D), each with a minimum and maximum corner radius. An inbuilt finite difference code with staggered arrangement of flow variables is used to discretize the governing equations. The concept of immersed boundary method (IBM) is employed to simulate flow around rounded corners using the regular Cartesian grids. The computational code was validated for flow past an isolated circular cylinder, square cylinder, and two equal sized circular cylinders and the results were found to be in very good agreement with available literatures. In the present study, results in terms of the mean and rms values of lift and drag coefficients, Strouhal number, phase diagrams, and contours of streamlines and vorticity are presented. As the corner radius is increased, a reduction in the drag force is observed. There exists a significant effect of gap ratio and corner radius on the phase angle of lift and drag coefficients. Three different flow patterns, namely the single bluff body flow, biased gapside flow, and two independent bluff body flows, were observed from this study.

MHD flow past a circular cylinder using the immersed boundary method

2010 ◽  
Vol 39 (2) ◽  
pp. 345-358 ◽  
Author(s):  
D.G.E. Grigoriadis ◽  
I.E. Sarris ◽  
S.C. Kassinos
Keyword(s):  
Circular Cylinder ◽  
Immersed Boundary Method ◽  
Mhd Flow ◽  
Immersed Boundary ◽  
Flow Past ◽  
Boundary Method

Flow past a rectangular cylinder close to a free surface

2019 ◽  
Vol 186 ◽  
pp. 106118 ◽  
Author(s):  
Wenjie Zhong ◽  
Lu Deng ◽  
Zhiying Xiao
Keyword(s):  
Free Surface ◽  
Rectangular Cylinder ◽  
Flow Past

Benchmark simulations of flow past rigid bodies using an open-source, sharp interface immersed boundary method

2017 ◽  
Vol 1 (1) ◽  
pp. 1 ◽  
Author(s):  
Clarence W. Rowley ◽  
Alexander J. Smits ◽  
Nicoleta Herzog ◽  
Hrvoje Jasak ◽  
Daniel Brunner ◽  
...  
Keyword(s):  
Open Source ◽  
Immersed Boundary Method ◽  
Rigid Bodies ◽  
Sharp Interface ◽  
Immersed Boundary ◽  
Flow Past ◽  
Boundary Method

scholarly journals An Improved Direct-Forcing Immersed Boundary Method for Fluid-Structure Interaction Simulations

2013 ◽  
Author(s):  
Xing Zhang ◽  
Xiaojue Zhu ◽  
Guowei He
Keyword(s):  
Immersed Boundary Method ◽  
Fluid Structure Interaction ◽  
Three Dimensional ◽  
Immersed Boundary ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Dimensional Flow ◽  
Flow Past ◽  
Boundary Method ◽  
Direct Forcing

Simulation of fluid-structure interaction (FSI) of flexible bodies are challenging due to complex geometries and freely moving boundaries. Immersed boundary method has found to be an efficient technique for dealing with FSI problems because of the use of non-body-fitted mesh and simple implementation. In the present work, we developed a FSI solver by coupling a direct forcing immersed boundary method for the fluid with a finite difference method of the structure. Several flow problems are simulated to validate our method. The testing cases include flow over a stationary cylinder and flat plate, two-dimensional flow past an inextensible flexible filament and three-dimensional flow past a flag. The results obtained agree well with those from previously published literatures.

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