scholarly journals Animproved ghost cell method for flow simulation involving static and moving boundary

2019 ◽  
Vol 68 (12) ◽  
pp. 124703
Author(s):  
Feng Wei ◽  
Liang Jin ◽  
Jun Liu ◽  
Feng Ding ◽  
Xin-Ping Zheng
Keyword(s):  
Moving Boundary ◽  
Flow Simulation ◽  
Ghost Cell ◽  
Cell Method ◽  
Ghost Cell Method

A Radial Basis Function–Based Ghost Cell Method for Complex Rigid or Flexible Moving Boundary Flows

2020 ◽  
Vol 18 (01) ◽  
pp. 2050025
Author(s):  
Jianjian Xin ◽  
Zhenlei Chen ◽  
Fan Shi ◽  
Fulong Shi ◽  
Qiu Jin
Keyword(s):  
Radial Basis Function ◽  
Basis Function ◽  
Moving Boundary ◽  
Interpolation Method ◽  
Immersed Boundary ◽  
Ghost Cell ◽  
Cell Method ◽  
Radial Basis ◽  
Ghost Cell Method ◽  
Irregular Boundaries

A radial basis function (RBF)-based ghost cell method is presented to simulate flows around a rigid or flexible moving hydrofoil on a Cartesian grid. A compactly supported radial basis function (CSRBF) is introduced to the ghost cell immersed boundary method to treat the complex flexible boundaries in the fluid. The results indicate that this RBF representation method can accurately track tempo-spatially varied interfaces and avoid the identification failure encountered in original RBF. In addition, an interface cell interpolation method is developed to treat the irregular boundaries such as sharp points and thin boundaries. Solution quality is improved by constructing the interface cells along the local irregular boundaries, instead of the ghost cells. To validate the proposed method, uniform flows around stationary and pitching hydrofoils are simulated. Then, a flexible hydrofoil undulating in the fluid is simulated. Good agreements are obtained by comparing the present results with the reference results. Furthermore, the relationship between the oscillation frequency and the force coefficient is studied. Also, generation mechanism of the thrust force is explained.

GHOST-CELL METHOD FOR INVISCID THREE-DIMENSIONAL FLOWS WITH MOVING BODY ON CARTESIAN GRIDS

2009 ◽  
Vol 23 (03) ◽  
pp. 277-280
Author(s):  
JIANMING LIU ◽  
NING ZHAO ◽  
OU HU
Keyword(s):  
Three Dimensional ◽  
Small Cell ◽  
Special Treatment ◽  
Ghost Cell ◽  
Cartesian Grids ◽  
Cell Problem ◽  
Cell Method ◽  
Moving Body ◽  
Ghost Cell Method ◽  
Moving Bodies

This paper depicts a ghost cell method to solve the three dimensional compressible time-dependent Euler equations using Cartesian grids for static or moving bodies. In this method, there is no need for special treatment corresponding to cut cells, which complicate other Cartesian mesh methods, and the method avoids the small cell problem. As an application, we present some numerical results for a special moving body using this method, which demonstrates the efficiency of the proposed method.

The Ghost Cell Method for Inviscid Compressible Flow on Adaptive Tree Cartesian Grids

2010 ◽  
Author(s):  
Jianming Liu ◽  
Ning Zhao ◽  
Ou Hu ◽  
Jane W. Z. Lu ◽  
Andrew Y. T. Leung ◽  
...  
Keyword(s):  
Compressible Flow ◽  
Ghost Cell ◽  
Cartesian Grids ◽  
Cell Method ◽  
Ghost Cell Method ◽  
Inviscid Compressible Flow
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