Questions tagged [multiphysics]

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How can we symbolically working out $\phi^4$ theory green's function/propagator and consequences in python?

I am having some difficulty calculating Green's function symbolically in Python for $\phi^4$ theory. The specific rendition of the $\phi^4$ theory I have in mind can be written as follows. $\mathcal{L}...
kevin Tah N.'s user avatar
0 votes
0 answers
34 views

thermal-hydro-mechanical (THM) coupling

Does anyone know good literature about thermal-hydro-mechanical (THM) coupling in Abaqus? In particular, I would like to know the theory behind the C3D8PT element. Thanks.
kstn's user avatar
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Advice for a beginner to a computational physics problem

I am a beginner in computational physics but have a background in physics, math, and programming (from online courses, videos, and textbooks) and I would like to know how should I: Approach and think ...
Physics Compiler v2's user avatar
3 votes
2 answers
274 views

How to enforce fluid and solid dynamic coupling in fluid-structure interactions using the finite element method?

I apologize in advance if the question has been posted before or if it sounds a bit naive. I am writing my own code in MATLAB for a staggered finite element solver for fluid-structure interaction ...
Mohamed Abdelhamid's user avatar
1 vote
0 answers
110 views

Weird "oscillatory" modes appearing in FEM simulations

I am using COMSOL to solve a mathematical model involving thermoelectric hydrodynamic (TEMHD) flow. I am running a very large parameter sweep and using the solutions obtained to make some plots. ...
epsilonD3LT4's user avatar
4 votes
2 answers
135 views

Which algorithms(paper) should be reproduced by a student to enter the field of computational fluid-structure interaction?

We'd better not to reinvent the wheel. But without some programming, one can hardly understand computational fluid-structure interaction. And I would like to know which papers or algorithms should a ...
Dong Ivan's user avatar
  • 115
2 votes
1 answer
94 views

Mathematical foundations of the fractional step method

The well-known method for solving multi-physics time-evolution problems called "the method of fractional steps" or "the method of splitting" usually applies to PDEs which have a ...
Maxim Umansky's user avatar
2 votes
0 answers
47 views

Open source multiphysics software that can model the interaction of two insulators with a user-specified electrical force law?

Given two solid bodies of masses $m_1$ and $m_2$ with invariable charge distributions $\rho_1(\mathbf{r_1})$ and $\rho_2(\mathbf{r_2})$ in them,* respectively, I would like to model the electrical ...
Geremia's user avatar
  • 147
1 vote
1 answer
1k views

Can we simulate rigid body motion using finite element analysis?

I was wondering if we could model rigid body motion of bodies using finite element models. Particularly I'm interested to know if we can model motion of objects with no constraints or with some ...
tired and bored dev's user avatar
1 vote
1 answer
90 views

How to deal with multi-region problems (in PETSc)

Consider a problem where space is filled with a liquid and a solid phase, with a large, complicated geometry. On each of the phases, there's an electrical potential/poisson equation. The equations are ...
Michael's user avatar
  • 1,463
0 votes
1 answer
118 views

Most suitable particle-tracking software

I have a problem for which I am trying to determine the most suitable software to use. Here is a brief description of the problem. I have a mixture of inertial particles A and B with different ...
GreenEye's user avatar
4 votes
0 answers
215 views

Once and for all: Which FEM plattform should I use for a very large multiphysics simulation?

I'm fooling around with the decision on how to build a multiphysics simulation for too long now (also several questions in this forum). First, I thought it would be possible/necessary to write most of ...
Michael's user avatar
  • 1,463
7 votes
4 answers
1k views

Fluid-structure interaction solver for cardiovascular applications

I would like to start running FSI simulations for cardiovascular applications. More precisely, I'm interested in the behaviour of aortic valve under physiological flow conditions in which the ...
user117893's user avatar
2 votes
2 answers
106 views

Looking for some literature about numerical solution of _coupled_ PDEs

There's a vast amount of literature about the numerical solution of partial differential equations. But in none of my books or lectures did I find anything about coupled systems. Internet and library ...
Michael's user avatar
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5 votes
1 answer
229 views

Mapping SPH data on Eulerian Grid for further evolution

I'm sure this is very important for anyone working in computational astrophysics. I have a .sph file & it has 10 columns containing ...
sceptic_one's user avatar
6 votes
1 answer
225 views

Advice on solving a coupled physics problem

I am taking a shot at solving a coupled physics problem. I have this matrix formed: $\mathbf{J}=\begin{bmatrix} \mathbf{A} & \mathbf{B}\\ \mathbf{C} & \mathbf{D} \end{bmatrix}$ where $\...
user2183232343's user avatar
5 votes
1 answer
183 views

Stabilization of solution to one-dimensional system of PDE

I am trying to solve numerically next PDE system: $$\frac{\partial c}{\partial t}=\epsilon\frac{\partial}{\partial x}(\frac{\partial c}{\partial x}+\rho\frac{\partial \varphi}{\partial x}+\frac{vc}{1-...
oleksandrv's user avatar
16 votes
2 answers
339 views

What are the best practices for algorithms and implementation of multi-physics simulations?

Multi-physics simulation involves coupling multiple "physics", often with different space and/or time scales. Additionally, the single-physics codes are often written by different teams. The most ...
Jed Brown's user avatar
  • 25.6k
17 votes
5 answers
634 views

Are there operator splitting approaches for multiphysics PDEs that achieve high order convergence?

Given an evolution PDE $$u_t = Au + Bu$$ where $A,B$ are (possibly nonlinear) differential operators that don't commute, a common numerical approach is to alternate between solving $$u_t = Au$$ ...
David Ketcheson's user avatar