Hello everyone, I have migrated to Julia about less than a month ago from Fortran + Matlab. I started learning C++ last year to write MPI codes but found it too cumbersome. In Julia, my main goal is to write parallel codes for numerical PDEs either using multithreading (@threads @floop etc) or mul…

[image] Debasish: I need to see a few examples of PDEs, something as simple as Laplace or Poisson equation solved using finite/boundary element or finite difference or finite volume implemented using a solver in parallel. Preferably, something that is explained/written in a pedagogical style. Fo…

Thank you very much for the prompt response. I have written a minimal boundary element method code for a 2D sine wave. It solves the Stokes equation using boundary integral formulation. [image] Improving performance of Integral equations (3-Nested loops) Performance [onlye…

(Hi Uwe) Do they show how to write a parallel code for a PDE? I could not find it, sorry.

Are you saying I will not benefit from parallelising the for-loops or storing the matrix RM in different processors when it gets too large, like (40,000 x 40,000) or so? I don’t know if this helps, but you may want to look at PencilArrays.jl for this. Note that it works on top of MPI via MPI.jl . …

[image] Debasish: Are you saying I will not benefit from parallelising the for-loops or storing the matrix RM in different processors when it gets too large, like (40,000 x 40,000) or so? Not very much. When your equations are large, the O(n^2) operations are dwarfed by the O(n^3) operation. …

(Hi Juan) Thanks for making me aware of https://github.com/jipolanco/PencilArrays.jl/ . It looks promising and very close to what I have in mind. Can it handle unstructured grids like in finite or boundary elements? Also, are there any finite element libraries in Julia that use any kind of paralleli…

Can it handle unstructured grids like in finite or boundary elements? Unfortunately, I don’t think so. It was really made with structured grids in mind. It was initially conceived for spectral methods, but it should also be useful for other structured methods. Also, are there any finite element…

Tutorials or examples on multithreading and distributed processing for numerical PDEs

New to Julia

ufechner7 May 31, 2021, 10:28pm 4

Did you look at GitHub - JuliaParallel/Elemental.jl: Julia interface to the Elemental linear algebra library. ?

2 Likes

Topic		Replies	Views
Julia's FEM Landscape: where should DifferentialEquations go? Numerics diffeq	37	9693	December 10, 2020
Julia can be dramatically slower than Matlab when solving 2D PDE New to Julia performance , matlab , pde	42	1641	November 9, 2024
Implementing parallel computing in finite element problems Numerics	6	2085	August 15, 2018
Simplest way to convert a program for parallel (multithreaded) runs on multiple servers/cores? Julia at Scale	26	2153	February 22, 2021
Implementing parallel fluids code in Julia (parallel FFTW, MPI.jl, ...) Numerics	34	10170	September 21, 2017

Tutorials or examples on multithreading and distributed processing for numerical PDEs

Related topics