scholarly journals Numerical simulation of complex immersed boundary flow by a radial basis function ghost cell method

2017 ◽  
Vol 66 (4) ◽  
pp. 044704
Author(s):  
Xin Jian-Jian ◽  
Shi Fu-Long ◽  
Jin Qiu
Keyword(s):  
Numerical Simulation ◽  
Radial Basis Function ◽  
Basis Function ◽  
Immersed Boundary ◽  
Ghost Cell ◽  
Cell Method ◽  
Boundary Flow ◽  
Radial Basis ◽  
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.

scholarly journals Numerical simulation of mixing of two-phase fluid using radial basis function

2019 ◽  
Author(s):  
Eko Prasetya Budiana ◽  
Wibawa Endra Juwana ◽  
Pranowo ◽  
Indarto ◽  
Deendarlianto
Keyword(s):  
Numerical Simulation ◽  
Radial Basis Function ◽  
Basis Function ◽  
Two Phase ◽  
Radial Basis ◽  
Phase Fluid
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