On the free surface boundary of moving particle semi-implicit method for thermocapillary flow

2022 ◽  
Vol 135 ◽  
pp. 266-283
Author(s):  
Zidi Wang ◽  
Tomoyuki Sugiyama
Keyword(s):  
Free Surface ◽  
Thermocapillary Flow ◽  
Implicit Method ◽  
Surface Boundary ◽  
Moving Particle

An Improved Moving Particle Semi-Implicit Method for Free Surface Flows

2014 ◽  
Vol 571-572 ◽  
pp. 682-687
Author(s):  
Qiao Rui Wu ◽  
Xiong Liang Yao
Keyword(s):  
Free Surface ◽  
Hydrostatic Pressure ◽  
Large Deformation ◽  
Pressure Oscillation ◽  
Free Surface Flows ◽  
Dam Break ◽  
Implicit Method ◽  
Surface Flows ◽  
Collision Model ◽  
Moving Particle

The objective of this study is to make some improvements to the original Moving Particle Semi-implicit method (MPS) for free surface flows. Compared to traditional mesh methods, MPS is feasible to simulate surface flows with large deformation, however, during the simulation; the pressure oscillation is quite violent, duo to misjudgment of surface particles as well as particles gathering together. To modify this problem, a new arc method is applied to judge free surface particles, and a collision model is introduced to avoid particles from gathering together. Hydrostatic pressure and classical dam break are investigated by original and improved MPS. The results verify that improved MPS method is more effective for free surface flows.

Improvement of Pressure Calculations in the Moving Particle Semi-Implicit Method for Free-Surface Flows

2019 ◽  
Vol 17 (09) ◽  
pp. 1950062 ◽  
Author(s):  
Wenjin Gou ◽  
Shuai Zhang ◽  
Yao Zheng
Keyword(s):  
Free Surface ◽  
Free Surface Flow ◽  
Free Surface Flows ◽  
Surface Flow ◽  
Surface Boundary ◽  
Navier Stokes Equation ◽  
Surface Flows ◽  
Mps Method ◽  
Flow Simulations ◽  
Moving Particle

In this paper, numerical improvements are implemented for solving for the pressure in the moving particle semi-implicit (MPS) method for free-surface flow simulations. The tensile instability problem is solved using a dynamic stabilization (DS) algorithm. The low numerical diffusion of this algorithm is shown through numerical tests. A free-surface treatment that includes an accurate free-surface particle detection algorithm and the implicit application of a free-surface boundary condition is used. The solution of the Navier–Stokes equation is improved using a particle shifting (PS) algorithm. The proposed MPS method for free-surface flow simulations is successfully applied in several benchmark tests and two- and three-dimensional dam break problems. The numerical simulation results agree well with the analytical and empirical ones. It is shown that the proposed MPS method effectively improves the stability and accuracy of simulations of free-surface flows.

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