| Verse |
October 13, 2016 14:51 |
6DOF Solver - Center of Mass and Center of Rotation
Hello,
I've tried defining both centreOfMass and centreOfRotation inside the dynamicMeshDict, as follows:
Code:
...
centreOfMass (0.4 0 0.1)
centreOfRotation (-0.5 0 0.1)
...
After doing this, I recieve an error message as follows:
Code:
#0 Foam::error::printStack(Foam::Ostream&) at ??:?
#1 Foam::sigFpe::sigHandler(int) at ??:?
#2 ? in "/lib/x86-64-linux-gnu/libc.so.6"
...
I see that from the sixDoFRigidBodyMotionState.C code that the solver will default to centreOfMass if the centreOfRotation isn't present:
Code:
/*---------------------------------------------------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2011-2014 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
OpenFOAM is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
\*---------------------------------------------------------------------------*/
#include "sixDoFRigidBodyMotionState.H"
// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
Foam::sixDoFRigidBodyMotionState::sixDoFRigidBodyMotionState()
:
centreOfRotation_(vector::zero),
Q_(I),
v_(vector::zero),
a_(vector::zero),
pi_(vector::zero),
tau_(vector::zero)
{}
Foam::sixDoFRigidBodyMotionState::sixDoFRigidBodyMotionState
(
const dictionary& dict
)
:
centreOfRotation_
(
dict.lookupOrDefault
(
"centreOfRotation",
dict.lookupOrDefault("centreOfMass", vector::zero)
)
),
Q_(dict.lookupOrDefault("orientation", tensor::I)),
v_(dict.lookupOrDefault("velocity", vector::zero)),
a_(dict.lookupOrDefault("acceleration", vector::zero)),
pi_(dict.lookupOrDefault("angularMomentum", vector::zero)),
tau_(dict.lookupOrDefault("torque", vector::zero))
{}
But surely there should be a way I could define both in the same test case? Including the effects of gravity is significantly important for my test case (but I also need rotation), so having these two variables as separate is very important.
Thank you. |
