Numerical visualisation of physical values during human swallowing using a three-dimensional swallowing simulator ‘Swallow Vision®’ based on the moving particle simulation method

2018 ◽  
Vol 7 (4) ◽  
pp. 382-388
Author(s):  
Tetsu Kamiya ◽  
Yoshio Toyama ◽  
Keigo Hanyu ◽  
Megumi Takai ◽  
Takahiro Kikuchi ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Simulation Method ◽  
Particle Simulation ◽  
Particle Simulation Method ◽  
Moving Particle

Thermo-mechanical coupling particle simulation of three-dimensional large-scale non-isothermal problems

2017 ◽  
Vol 34 (5) ◽  
pp. 1551-1571 ◽  
Author(s):  
Ming Xia
Keyword(s):  
Large Scale ◽  
Three Dimensional ◽  
Simulation Method ◽  
Particle Simulation ◽  
Similarity Criteria ◽  
Particle Model ◽  
Length Scale ◽  
Content Type ◽  
Mechanical Coupling ◽  
Particle Simulation Method

Purpose The main purpose of this paper is to present a comprehensive upscale theory of the thermo-mechanical coupling particle simulation for three-dimensional (3D) large-scale non-isothermal problems, so that a small 3D length-scale particle model can exactly reproduce the same mechanical and thermal results with that of a large 3D length-scale one. Design/methodology/approach The objective is achieved by following the scaling methodology proposed by Feng and Owen (2014). Findings After four basic physical quantities and their similarity-ratios are chosen, the derived quantities and its similarity-ratios can be derived from its dimensions. As the proposed comprehensive 3D upscale theory contains five similarity criteria, it reveals the intrinsic relationship between the particle-simulation solution obtained from a small 3D length-scale (e.g. a laboratory length-scale) model and that obtained from a large 3D length-scale (e.g. a geological length-scale) one. The scale invariance of the 3D interaction law in the thermo-mechanical coupled particle model is examined. The proposed 3D upscale theory is tested through two typical examples. Finally, a practical application example of 3D transient heat flow in a solid with constant heat flux is given to illustrate the performance of the proposed 3D upscale theory in the thermo-mechanical coupling particle simulation of 3D large-scale non-isothermal problems. Both the benchmark tests and application example are provided to demonstrate the correctness and usefulness of the proposed 3D upscale theory for simulating 3D non-isothermal problems using the particle simulation method. Originality/value The paper provides some important theoretical guidance to modeling 3D large-scale non-isothermal problems at both the engineering length-scale (i.e. the meter-scale) and the geological length-scale (i.e. the kilometer-scale) using the particle simulation method directly.

A novel ghost cell boundary model for the explicit moving particle simulation method in two dimensions

2020 ◽  
Vol 66 (1) ◽  
pp. 87-102 ◽  
Author(s):  
Zumei Zheng ◽  
Guangtao Duan ◽  
Naoto Mitsume ◽  
Shunhua Chen ◽  
Shinobu Yoshimura
Keyword(s):  
Simulation Method ◽  
Two Dimensions ◽  
Particle Simulation ◽  
Cell Boundary ◽  
Ghost Cell ◽  
Particle Simulation Method ◽  
Boundary Model ◽  
Moving Particle

Simulation of Multi-Liquid-Layer Sloshing With Vessel Motion by Using Moving Particle Simulation

2014 ◽  
Author(s):  
Kyung Sung Kim ◽  
Moo Hyun Kim ◽  
Jong-Chun Park
Keyword(s):  
Simulation Method ◽  
Gas Production ◽  
Particle Simulation ◽  
Linear Potential ◽  
Particle Simulation Method ◽  
Moving Particle ◽  
Vessel Motion ◽  
Linear Potential Theory ◽  
Oil Gas ◽  
Surface Tension Model

For oil/gas production/processing platforms, multiple liquid layers can exist and their respective sloshing motions can also affect platform performance. To numerically simulate those problems, a new multi-liquid MPS (Moving Particle Simulation) method is developed. In particular, to better simulate the relevant physics, robust self-buoyancy model, interface searching model, and surface-tension model are developed. The developed multi-liquid MPS method is validated by comparisons against Molin et al’s (2012) three-liquid-sloshing experiment and the corresponding linear potential theory. The verified multi-liquid MPS program is subsequently coupled with a vessel-motion program in time domain to investigate their dynamic-coupling effects. In case of multiple liquid layers, there exist more than one sloshing natural frequencies, so the relevant physics can be much more complicated compared with the single-liquid-tank case. The numerical simulations also show that liquid cargo can function as a beneficial anti-rolling device.

Sign in / Sign up

Export Citation Format

Share Document