Fully resolved simulation of a shockwave interacting with randomly clustered particles via a ghost-cell immersed boundary method

2020 ◽  
Vol 32 (6) ◽  
pp. 066105
Author(s):  
Wei Xiao ◽  
Chaoli Mao ◽  
Tai Jin ◽  
Kun Luo ◽  
Jianren Fan
Keyword(s):  
Immersed Boundary Method ◽  
Immersed Boundary ◽  
Ghost Cell ◽  
Boundary Method ◽  
Fully Resolved Simulation

scholarly journals A Ghost-Cell Immersed Boundary Method for Wave–Structure Interaction Using a Two-Phase Flow Model

Water ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3346
Author(s):  
Yuan-Shiang Tsai ◽  
Der-Chang Lo
Keyword(s):  
Immersed Boundary Method ◽  
Flow Model ◽  
Two Phase Flow ◽  
Immersed Boundary ◽  
Phase Flow ◽  
Ghost Cell ◽  
Two Phase ◽  
Boundary Method ◽  
Lift Forces ◽  
Drag And Lift

The air-water two-phase flow model is developed to study the transformation of monochromatic waves passing over the submerged structure. The level set method is employed to describe the motion of the interface while the effect of the immersed object on the fluid is resolved using the ghost-cell immersed boundary method. The computational domain integrated with the air-water and fluid-solid phases allows the use of uniform Cartesian grids. The model simulates the wave generation, wave decomposition over a submerged trapezoidal breakwater, and the formation of the vortices as well as the drag and lift forces caused by the surface waves over three different configurations of the submerged structures. The numerical results show the capability of the present model to accurately track the deformation of the free surface. In addition, the variation of the drag and lift forces depend on the wavelength and wave induced vortices around the submerged object. Hence, the study observes that the triangular structure experiences the relatively small wave force.

scholarly journals Fully resolved simulations of single char particle combustion using a ghost‐cell immersed boundary method

AIChE Journal ◽  
2018 ◽  
Vol 64 (7) ◽  
pp. 2851-2863 ◽  
Author(s):  
Kun Luo ◽  
Chaoli Mao ◽  
Jianren Fan ◽  
Zhenya Zhuang ◽  
Nils Erland L. Haugen
Keyword(s):  
Immersed Boundary Method ◽  
Immersed Boundary ◽  
Ghost Cell ◽  
Particle Combustion ◽  
Boundary Method ◽  
Char Particle

A directional ghost-cell immersed boundary method for incompressible flows

2020 ◽  
Vol 404 ◽  
pp. 109122 ◽  
Author(s):  
Cheng Chi ◽  
Abouelmagd Abdelsamie ◽  
Dominique Thévenin
Keyword(s):  
Immersed Boundary Method ◽  
Incompressible Flows ◽  
Immersed Boundary ◽  
Ghost Cell ◽  
Boundary Method

Fully Resolved Simulation of Particulate Flow Using a Sharp Interface Direct Forcing Immersed Boundary Method

2013 ◽  
Author(s):  
Jianming Yang ◽  
Frederick Stern
Keyword(s):  
Immersed Boundary Method ◽  
Solid Particles ◽  
Sharp Interface ◽  
Particulate Flow ◽  
Immersed Boundary ◽  
Fluid Structure ◽  
Boundary Method ◽  
Direct Forcing ◽  
Fully Resolved Simulation ◽  
Predictor Corrector

In this paper, the sharp interface, direct forcing immersed boundary method developed by Yang and Stern (A simple and efficient direct forcing immersed boundary framework for fluid-structure interactions, J. Comput. Phys. 231 (2012) 5029–5061) is applied to the fully resolved simulation of particulate flow. This method uses a discrete forcing approach and maintains a sharp profile of the fluid/solid interface. Also, it employs a strong coupling scheme for fluid-structure interaction through a predictor-corrector algorithm. The fluid flow solver is not included in the predictor-corrector iterative loop thanks to the direct forcing idea, which makes the overall algorithm highly efficient and very attractive for the fully resolved simulation of particulate flow with numerous solid particles. Several cases including sedimenting and buoyant particles and the interaction of two sedimenting particles showing kissing, drafting, and tumbling phenomenon are examined and compared with the reference results to demonstrate the simplicity and applicability of our method in particulate flow simulations.

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