scholarly journals A simple collision algorithm for arbitrarily shaped objects in particle‐resolved flow simulation using an immersed boundary method

2020 ◽  
Vol 92 (10) ◽  
pp. 1256-1273 ◽  
Author(s):  
Takayuki Nagata ◽  
Mamoru Hosaka ◽  
Shun Takahashi ◽  
Ken Shimizu ◽  
Kota Fukuda ◽  
...  
Keyword(s):  
Immersed Boundary Method ◽  
Flow Simulation ◽  
Immersed Boundary ◽  
Boundary Method

Flow simulation around a kidney stone by using immersed boundary method

2018 ◽  
Vol 2018.30 (0) ◽  
pp. 2H02
Author(s):  
Ken SHIMIZU ◽  
Mamoru HOSAKA ◽  
Yuki KATO ◽  
Takayuki NAGATA ◽  
Shun TAKAHASHI ◽  
...  
Keyword(s):  
Immersed Boundary Method ◽  
Kidney Stone ◽  
Flow Simulation ◽  
Immersed Boundary ◽  
Boundary Method

scholarly journals A Simple Immersed Boundary Method for Compressible Flow Simulation around a Stationary and Moving Sphere

2015 ◽  
Vol 2015 ◽  
pp. 1-17 ◽  
Author(s):  
Yusuke Mizuno ◽  
Shun Takahashi ◽  
Taku Nonomura ◽  
Takayuki Nagata ◽  
Kota Fukuda
Keyword(s):  
Turbulent Flows ◽  
Immersed Boundary Method ◽  
Stokes Equations ◽  
Three Dimensional ◽  
Flow Simulation ◽  
Immersed Boundary ◽  
Hybrid Scheme ◽  
Flow Solver ◽  
Advantages And Disadvantages ◽  
Boundary Method

This study is devoted to investigating a flow around a stationary or moving sphere by using direct numerical simulation with immersed boundary method (IBM) for the three-dimensional compressible Navier-Stokes equations. A hybrid scheme developed to solve both shocks and turbulent flows is employed to solve the flow around a sphere in the equally spaced Cartesian mesh. Drag coefficients of the spheres are compared with reliable values obtained from highly accurate boundary-fitted coordinate (BFC) flow solver to clarify the applicability of the present method. As a result, good agreement was obtained between the present results and those from the BFC flow solver. Moreover, the effectiveness of the hybrid scheme was demonstrated to capture the wake structure of a sphere. Both advantages and disadvantages of the simple IBM were investigated in detail.

scholarly journals Direct Numerical Simulation of Gas–Particle Flows with Particle–Wall Collisions Using the Immersed Boundary Method

2018 ◽  
Vol 8 (12) ◽  
pp. 2387 ◽  
Author(s):  
Yusuke Mizuno ◽  
Shun Takahashi ◽  
Kota Fukuda ◽  
Shigeru Obayashi
Keyword(s):  
Immersed Boundary Method ◽  
Three Dimensional ◽  
Flow Simulation ◽  
Navier Stokes ◽  
Immersed Boundary ◽  
Navier Stokes Equation ◽  
Level Set Function ◽  
Boundary Method ◽  
The One ◽  
Energy And Momentum

We investigated particulate flows by coupling simulations of the three-dimensional incompressible Navier–Stokes equation with the immersed boundary method (IBM). The results obtained from the two-way coupled simulation were compared with those of the one-way simulation, which is generally applied for clarifying the particle kinematics in industry. In the present flow simulation, the IBM was solved using a ghost–cell approach and the particles and walls were defined by a level set function. Using proposed algorithms, particle–particle and particle–wall collisions were implemented simply; the subsequent coupling simulations were conducted stably. Additionally, the wake structures of the moving, colliding and rebounding particles were comprehensively compared with previous numerical and experimental results. In simulations of 50, 100, 200 and 500 particles, particle–wall collisions were more frequent in the one–way scheme than in the two-way scheme. This difference was linked to differences in losses in energy and momentum.

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