There are no Solvers in the System

Numerical methods and mathematical models of Elmer
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mintento
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Joined: 14 Oct 2020, 14:07
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There are no Solvers in the System

Post by mintento »

Hi, I am very new to Elmer and I am trying to simulate a heat transfer process on a brick wall with conduction, convection, and radiation. However, this error appeared on the Solver Log (attached below).

What should I do? I tried searching this error on the Forum's search bar and as far as I know there are no forum with this error return.

Any help is appreciated. Thank you very much

ELMER SOLVER (v 8.4) STARTED AT: 2020/10/14 18:02:58
ParCommInit: Initialize #PEs: 1
MAIN:
MAIN: =============================================================
MAIN: ElmerSolver finite element software, Welcome!
MAIN: This program is free software licensed under (L)GPL
MAIN: Copyright 1st April 1995 - , CSC - IT Center for Science Ltd.
MAIN: Webpage http://www.csc.fi/elmer, Email elmeradm@csc.fi
MAIN: Version: 8.4 (Rev: Release, Compiled: 2020-08-03)
MAIN: Running one task without MPI parallelization.
MAIN: Running with just one thread per task.
MAIN: Lua interpreted linked in.
MAIN: =============================================================

LoadInputFile: Reading only "Run Control" section

MAIN:
MAIN:
MAIN: -------------------------------------
MAIN: Reading Model: case.sif

LoadInputFile: Scanning input file: case.sif
LoadInputFile: Scanning only size info
LoadInputFile: First time visiting
LoadInputFile: Reading base load of sif file
LoadInputFile: Loading input file: case.sif
LoadInputFile: Reading base load of sif file
LoadInputFile: Number of BCs: 2
LoadInputFile: Number of Body Forces: 0
LoadInputFile: Number of Initial Conditions: 1
LoadInputFile: Number of Materials: 1
LoadInputFile: Number of Equations: 1
ERROR:: LoadInputFile: There are no Solvers in the system!

STOP 1
kevinarden
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Re: There are no Solvers in the System

Post by kevinarden »

need to post your sif file and if possible your mesh
search this forum, this solution has appeared many times.
mintento
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Joined: 14 Oct 2020, 14:07
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Re: There are no Solvers in the System

Post by mintento »

Dear Kevin,

Here is my .sif file.

What keywords should I use to find said solutions? Thank you very much
Attachments
case.sif
(1.22 KiB) Downloaded 255 times
gagliar
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Location: LGGE - Grenoble
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Re: There are no Solvers in the System

Post by gagliar »

Hello,
In section "Equation 1", there is no solver indicated!
You should have a line of that type in this section

Active Solvers (1)= 1

But also you should have at least one solver section which tells which equation you are solving!

See examples in /elmerfem/fem/tests of the source code.

Regards,
Olivier
kevinarden
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Re: There are no Solvers in the System

Post by kevinarden »

If you are building the sif with ElmerGUI you need to check the active solver box when you create an equation.

try doing some of the Elmer tutorial files

https://www.nic.funet.fi/pub/sci/physics/elmer/doc/
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