Search found 17 matches
- 13 Dec 2020, 19:45
- Forum: ElmerSolver
- Topic: Question Regarding ElmerSolver Capabilities with Soft Limiter and Discontinious Galerkin Method
- Replies: 1
- Views: 1465
Question Regarding ElmerSolver Capabilities with Soft Limiter and Discontinious Galerkin Method
I've been looking for the answer to this question elsewhere. Maybe it has already been asked and answered, but I've not been able to find it. I've put together a couple User Solvers using the ModelPDE as a basis. I know that certain attributes like adaptive meshing require code in the user module to...
- 27 Nov 2020, 23:33
- Forum: General
- Topic: Diffusion Equation with Limited Source
- Replies: 1
- Views: 1565
Diffusion Equation with Limited Source
Good afternoon! I've been working on a multiphysics model that combines transport phenomena with a user solver. In the model, I am, in part, modelling the diffusion of a reactant from a sources in a reaction vessel. The source is modeled using mass transfer boundary condition with the equilibrium (i...
- 03 Nov 2020, 06:02
- Forum: Bug reports
- Topic: Simple Hexahedral Mesh Not Supported by Transient Simulation
- Replies: 9
- Views: 6409
Re: Simple Hexahedral Mesh Not Supported by Transient Simulation
Thank you so much!
- 02 Nov 2020, 23:02
- Forum: Bug reports
- Topic: Simple Hexahedral Mesh Not Supported by Transient Simulation
- Replies: 9
- Views: 6409
Re: Simple Hexahedral Mesh Not Supported by Transient Simulation
Here is another quick and simple example of a case.sif with this mesh. This time using the diffusion equation, so we don't have to worry about Reynold's number or any of that stuff. We don't even have to worry about non-linearities. This is just a really simple diffusion problem where the walls are ...
- 02 Nov 2020, 22:02
- Forum: Bug reports
- Topic: Simple Hexahedral Mesh Not Supported by Transient Simulation
- Replies: 9
- Views: 6409
Re: Simple Hexahedral Mesh Not Supported by Transient Simulation
I think there is a disconnect as to what we are talking about here. It is not that the nonlinear system doesn't converge, etc. It's not even that the linear solver doesn't converge (the prescription I have in my case.sif is a direct solver anyway, so that doesn't even make sense. It is that when I r...
- 02 Nov 2020, 06:25
- Forum: Bug reports
- Topic: Simple Hexahedral Mesh Not Supported by Transient Simulation
- Replies: 9
- Views: 6409
Simple Hexahedral Mesh Not Supported by Transient Simulation
I'm using Elmer 8.4 under Ubuntu 18.04. I used gnu compilers to compile the code The simple attached 3D hex mesh will not run under transient simulations. It appears that when I switch the simulation type to transient, the solver outputs NaN for all entries in the matrix. The solver produces real va...
- 12 Sep 2020, 01:56
- Forum: Bug reports
- Topic: Specific Heat Ratio Does Not Accept Input from UDF
- Replies: 1
- Views: 3184
Specific Heat Ratio Does Not Accept Input from UDF
I am using Elmer 8.4 on Ubuntu 18.04 LTS. Elmer is complied using gfortran. I have written a User Defined Function to calculate the specific heat ratio for a multi-component system for use with the Navier-Stokes "Flow" Solver. The solver will run just fine when I put a number for Specific ...
- 18 Jul 2020, 20:50
- Forum: Software development
- Topic: Directly Setting Dirichlet BCs Using Something Other than the Solution Variable
- Replies: 0
- Views: 7471
Directly Setting Dirichlet BCs Using Something Other than the Solution Variable
Good morning! I am attempting to rewrite a module I had written to make it more user-friendly for my community. I had originally written the model with a very complex SIF file and all sorts of MATC code. I'm in the process of rewriting the solver so that it is both less cumbersome and conforms to cu...
- 26 Feb 2019, 06:33
- Forum: General
- Topic: Using Body Force to Simulate Convection in a Navier-Stokes Problem
- Replies: 2
- Views: 2634
Re: Using Body Force to Simulate Convection in a Navier-Stokes Problem
Sorry for my delayed reply. :oops: The case sifs can be found on my git repo here: https://github.com/drschrank/elmerfem The case sif are under misc/SEOPsifs. The most recent sifs that are used in this study are XePolIncomp.sif and XePolPerGas.sif. There's a fair amount of preamble that uses MATC to...
- 18 Feb 2019, 17:28
- Forum: General
- Topic: Using Body Force to Simulate Convection in a Navier-Stokes Problem
- Replies: 2
- Views: 2634
Using Body Force to Simulate Convection in a Navier-Stokes Problem
Good morning! I've been working on a relatively complex 3D multi-physics problem using Elmer for a few years now. I've been studying a particular geometry during those years, and I've recently modified the geometry to a slightly larger scale. RbGeometry.png The original geometry is posted above (ign...