Wavenumber Optimized Immersed Boundary Method for Aeroacoustic Analysis Based on Cartesian Mesh

AIAA Journal ◽  
2016 ◽  
Vol 54 (10) ◽  
pp. 2988-3001 ◽  
Author(s):  
Yuma Fukushima ◽  
Takashi Misaka ◽  
Shigeru Obayashi ◽  
Daisuke Sasaki ◽  
Kazuhiro Nakahashi
Keyword(s):  
Immersed Boundary Method ◽  
Immersed Boundary ◽  
Cartesian Mesh ◽  
Boundary Method

Application of Combination of Local Domain Free Discretization and Immersed Boundary Method (LDFD-IBM) to Numerical Simulation of 3D Flows Over a Circular Cylinder

2014 ◽  
Author(s):  
Yanling Wu ◽  
Chang Shu ◽  
Johan Gullman-Strand
Keyword(s):  
Circular Cylinder ◽  
Immersed Boundary Method ◽  
Adaptive Mesh Refinement ◽  
Solid Wall ◽  
Three Dimensional ◽  
Immersed Boundary ◽  
Local Domain ◽  
Cartesian Mesh ◽  
Boundary Method ◽  
Dimensional Version

In this paper, the recent developed Local Domain Free Discretization method combined with Immersed Boundary Method (called LDFD-IBM) is extended from two-dimensional version to three-dimensional version. LDFD-IBM is a new member in the family of Cartesian mesh methods. The advantages of LDFD-IBM over other Cartesian mesh solvers includes: no cutting cell, easy to adaptive mesh refinement, easy to implement for moving boundary problems, truly second order accuracy over whole domain, no flow penetration into the solid wall. LDFD-IBM three-dimensional solver is then used to simulate three-dimensional flow past a circular cylinder. Both oblique mode and parallel mode of vortex shedding of the cylinder in three-dimensional configuration are reproduced according to different end-conditions. Oblique shedding is one of the important three-dimensional features that could influence the amplitude, frequency and phase of the flow-induced forces.

Towards a Parallel Implementation of an Immersed Boundary Method on Non-Uniform Cartesian Mesh Coupled With a Fluid Structure Interaction Model

2014 ◽  
Author(s):  
Z. Wei ◽  
Z. C. Zheng
Keyword(s):  
Immersed Boundary Method ◽  
Parallel Implementation ◽  
Fluid Structure Interaction ◽  
Three Dimensional ◽  
Interaction Model ◽  
Immersed Boundary ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Cartesian Mesh ◽  
Boundary Method

The immersed boundary methods are well known as an efficient flow solver for engineering problems involving fluid structure interactions. However, in order to obtain better results, higher resolutions near the immersed boundary points are desired. Non-uniform Cartesian mesh can easily fulfill this task without introducing a dramatic increase on the cost of computation and coding. In the current paper, an immersed boundary method with non-uniform Cartesian mesh is demonstrated. The Poisson problem is solved with assistance of a scientific parallel computational library PETSc. The code is validated with a three-dimensional flow over a stationary sphere. Then, a fluid-structure interaction model is coupled and validated with two-dimensional vortex induced vibration problems. Comparisons with previous studies are presented. The ultimate goal is to couple the fluid-structure interaction model with the three-dimensional immersed boundary method.

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