about Rayleigh numbe
how can i get or calculate Rayleigh number.
related docs: http://en.wikipedia.org/wiki/Rayleigh_number
Or try to give us some more details.
about Rayleigh number
i want an utility tool, or some help to develop once to calculate Rayleigh number as field.
to do this i need
- rho field
- T field
- nu and alpha
Do you have any knowledge about OpenFOAM programming so far, or are you a beginner?
i am new in openfoam programming, do you think that openfoam programming guide is enough to write a small utility.
I suggest you take a look at the slides from the 4th OpenFOAM Workshop.
Especially the Basic Training slides should be of interest to you.
In particular these:
thank you sega for your help and time
after reading this material i know how
-compile an solver
-add a new scalartransportproprieties like nu
-declaration of fields in creatfields.H
i hope to implement my own solver
but there is some thing i dont understand when
i tray to compile this equation inspired from programming tutorial
d(T)/dt + U*grad(T) = nu*laplacian(T)
i get some thing like this
[caelinux@localhost icoFoam]$ wmake
Making dependency list for source file icoFoam.C
SOURCE=icoFoam.C ; g++ -m32 -Dlinux -DDP -Wall -Wno-strict-aliasing -Wextra -Wno-unused-parameter -Wold-style-cast -O3 -DNoRepository -ftemplate-depth-40 -I/home/caelinux/OpenFOAM/OpenFOAM-1.4.1/src/finiteVolume/lnInclude -IlnInclude -I. -I/home/caelinux/OpenFOAM/OpenFOAM-1.4.1/src/OpenFOAM/lnInclude -fPIC -pthread -c $SOURCE -o Make/linuxGccDPOpt/icoFoam.o
icoFoam.C: In function ‘int main(int, char**)’:
icoFoam.C:83: error: no match for ‘operator==’ in ‘Foam::fvm::laplacian(const Foam::volScalarField&, Foam::GeometricField<Type, Foam::fvPatchField, Foam::volMesh>&) [with Type = double](((Foam::GeometricField<double, Foam::fvPatchField, Foam::volMesh>&)(& p))) == Foam::operator-(const Foam::tmp<Foam::GeometricField<Type, PatchField, GeoMesh> >&) [with Type = Foam::Vector<double>, PatchField = Foam::fvPatchField, GeoMesh = Foam::volMesh]()’
/home/caelinux/OpenFOAM/OpenFOAM-1.4.1/src/OpenFOAM/lnInclude/cellModelI.H:124: note: candidates are: bool Foam::operator==(const Foam::cellModel&, const Foam::cellModel&)
/home/caelinux/OpenFOAM/OpenFOAM-1.4.1/src/OpenFOAM/lnInclude/edgeI.H:147: note: bool Foam::operator==(const Foam::edge&, const Foam::edge&)
make: *** [Make/linuxGccDPOpt/icoFoam.o] Error 1
what that mean, if you know,
errors related to
Well how did you actually implement the equation?
Can you show us some code?
How is this related to the Rayleigh number?
the goal is to do some simulation for a specified Ra number 10E4 .. 10E7
Ra number is used in dimensionless "no dimonsioned" equations like here
but open foam use a dimensioned equations
so i have two choice
use openfoam dimensioned equations and calculate Ra number after
or write a new solver " equation with no dimension by changing dimension parameters in SetDimension.H", i prefer this second coice because i can control Ra numbre and i dont have to calculate it
what do you think
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