Developing a solver for OpenFOAM-combustion

Thamali · July 5, 2013, 01:45

Hi all,
I am a amateur to OpenFOAM as well as C++.Gone through the User Guide and Programmers guide.And learnt basics of C++.
My next point is to develop a solver related to wood chip combustion.

I am not clear about,steps to start compiling.Running OpenFoam in a virtual machine.
To start compiling do I have to download a C++ compiler first or I can use text editor directly.

Confused,please help.

akidess · July 5, 2013, 04:33

Learn how to compile your own solver by following this tutorial: http://openfoamwiki.net/index.php/Ho...ure_to_icoFoam. Don't just read it, but actually work through it.

Thamali · July 8, 2013, 07:00

Dear Kidess,

Thanks a lot.i went through the link.It solved many problems I had on how to start working in OpenFoam.

Thamali · July 10, 2013, 00:01

Now I am trying to going in to icoFoam directory and understand the icoFoam.C.

I could not get what is this UEqn.A() and UEqn.H().

Can anybody help me please?

akidess · July 10, 2013, 02:43

Have a look here http://bit.ly/12gLP8x (or right here)

Thamali · July 10, 2013, 04:50

Thanks.

I found a thread with same question.
http://www.cfd-online.com/Forums/ope...g-development/

Thamali · July 11, 2013, 00:32

Hi All,
I am trying to understand the .A() member function of fvMatrix<Type> class.
checking fvMatrix.C file.(line no 722 onwards)

http://foam.sourceforge.net/docs/cpp/a04763_source.html

Could someone please explain about this.I know that .A() function converts vector to a scalar.But what is the use of this function.Please try to help.

Thamali · July 11, 2013, 01:33

wow,got it.
.A() is for central coefficient,although I did not try to understand fvMatrix.C file.Found it from CFD book.That is what we are getting in discretised equation aP. like as follows(will be different according to the system.)

aP = aW + aE + aS + aN + aB + aT + ∆F

Thamali · July 11, 2013, 05:26

Quote:

Originally Posted by Thamali

wow,got it.
.A() is for central coefficient,although I did not try to understand fvMatrix.C file.Found it from CFD book.That is what we are getting in discretised equation aP. like as follows(will be different according to the system.)

aP = aW + aE + aS + aN + aB + aT + ∆F

The above mentioned is related.But,if anyone interested in the matter,please go through "Rhie-Chow" interpolation in openFoam.
Thanks.

July 5, 2013, 01:45	Developing a solver for OpenFOAM-combustion	#1
Thamali Member Thamali Join Date: Jul 2013 Posts: 67 Rep Power: 12	Hi all, I am a amateur to OpenFOAM as well as C++.Gone through the User Guide and Programmers guide.And learnt basics of C++. My next point is to develop a solver related to wood chip combustion. I am not clear about,steps to start compiling.Running OpenFoam in a virtual machine. To start compiling do I have to download a C++ compiler first or I can use text editor directly. Confused,please help.

July 5, 2013, 04:33		#2
akidess Senior Member Anton Kidess Join Date: May 2009 Location: Germany Posts: 1,377 Rep Power: 29	Learn how to compile your own solver by following this tutorial: http://openfoamwiki.net/index.php/Ho...ure_to_icoFoam. Don't just read it, but actually work through it. __________________ On twitter @akidTwit Spend as much time formulating your questions as you expect people to spend on their answer.

July 8, 2013, 07:00		#3
Thamali Member Thamali Join Date: Jul 2013 Posts: 67 Rep Power: 12	Dear Kidess, Thanks a lot.i went through the link.It solved many problems I had on how to start working in OpenFoam. Last edited by Thamali; July 10, 2013 at 00:00.

July 10, 2013, 00:01	icoFoam.C	#4
Thamali Member Thamali Join Date: Jul 2013 Posts: 67 Rep Power: 12	Now I am trying to going in to icoFoam directory and understand the icoFoam.C. I could not get what is this UEqn.A() and UEqn.H(). Can anybody help me please?

July 10, 2013, 02:43		#5
akidess Senior Member Anton Kidess Join Date: May 2009 Location: Germany Posts: 1,377 Rep Power: 29	Have a look here http://bit.ly/12gLP8x (or right here) __________________ On twitter @akidTwit Spend as much time formulating your questions as you expect people to spend on their answer.

July 10, 2013, 04:50		#6
Thamali Member Thamali Join Date: Jul 2013 Posts: 67 Rep Power: 12	Thanks. I found a thread with same question. http://www.cfd-online.com/Forums/ope...g-development/

July 11, 2013, 00:32	.A()	#7
Thamali Member Thamali Join Date: Jul 2013 Posts: 67 Rep Power: 12	Hi All, I am trying to understand the .A() member function of fvMatrix<Type> class. checking fvMatrix.C file.(line no 722 onwards) http://foam.sourceforge.net/docs/cpp/a04763_source.html Could someone please explain about this.I know that .A() function converts vector to a scalar.But what is the use of this function.Please try to help.

July 11, 2013, 01:33	.A()	#8
Thamali Member Thamali Join Date: Jul 2013 Posts: 67 Rep Power: 12	wow,got it. .A() is for central coefficient,although I did not try to understand fvMatrix.C file.Found it from CFD book.That is what we are getting in discretised equation aP. like as follows(will be different according to the system.) aP = aW + aE + aS + aN + aB + aT + ∆F

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