parasolver's Introduction

Particle Deformation

Introduction

Numerical simulation of particle deformation in the fluid flow.

We will explore the deformation of fluid particle in some turblent flow, such as canal, pipe flow(rond, square, L), then analyse the statistic comportment of particle deformation in these situations.

Visualization

Two dimensional deformation

3 dimensional deformation

Structure

case_2d: 2d fluid flow validation and simulation
case_3d: 3d fluid flow validation and simulation
common: implementations of the core function
- fileIO
- paraSolver
- visualization: geometric simulation
example: some running results
exp: where we do experiments using functions implemented in common
- exp_sing: study the deformation behavior of a single particle
- exp_stat: statical analyses of particle deformation

Function

ParaSolver: solve deformation parameters of particle
StatSolver: statistical analyse
Visualization: geometric simulation

Usage

open the exp folder
enter the exp_sin folder for single particle tracer, enter the exp_stat folder for statistic experiment

TODO

Performance optimization

Reference

McKenzie D. Finite deformation during fluid flow[J]. Geophysical Journal International, 1979, 58(3): 689-715.
Fang L, Wang S L, Hong J Y. Analytical expressions of the deformation limit of fluid particles[J]. Physics Letters A, 2017, 381(48): 3996-4004.
Xu H, Pumir A, Bodenschatz E. The pirouette effect in turbulent flows[J]. Nature Physics, 2011, 7(9): 709-712.
Subramanian N, Kellogg L H, Turcotte D L. Statistics of Advective Stretching in Three-dimensional Incompressible Flows[J]. Journal of Statistical Physics, 2009, 136(5): 926-944.
Zhao L, Andersson H I. Why spheroids orient preferentially in near-wall turbulence[J]. Journal of Fluid Mechanics, 2016, 807: 221.

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