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March 22, 2014, 15:54 
blockCoupledScalarTransport solver

#1 
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Hi everybody,
I am trying to solve 2 transport equations that are coupled each other and I modified blockCoupledScalarTransport.C in the way of my equations and the same as mentioned here http://sourceforge.net/p/openfoamex...TransportFoam/ I added all this files with makefile in my directory but when I want to compile my solver(the modified version of blockCoupledScalarTransport) I have this: In file included from tensor2Field.H:40:0, from tensor2Field.C:27: tensor2.H:39:21: fatal error: TensorN.H: No such file or directory compilation terminated. Does anybody knows what is this and what should I do? thanks in advance 

March 22, 2014, 18:23 

#2 
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Bruno Santos
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Greetings alisinas and welcome to the forum!
I'm not sure I understand your question. Are you trying to build this solver with or without OpenFOAM? Best regards, Bruno 

March 22, 2014, 18:39 

#3 
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thanks,
I am trying to use this solver by a little bit modification int the way of my equations in openfoam. 

March 22, 2014, 18:53 

#4  
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Bruno Santos
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Quote:


March 23, 2014, 06:11 

#5 
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thanks bruno for your answer
I knew about how to make our own solver but I did not know that I have to use this specific version of openfoam you mentioned.my equations are like below A) dT/dt +d/dx(UT)=0 B) dT/dt +d/dx(Uk)=0 dk/dt +d/dx(UT)=0 and k is another quantity that want to be transfered like T. I know these are not notation of openfoam in writing the equations I just want to mention my equations. do you have any other suggestion for this except using "blockCoupledScalarTransport"? regards, sina 

March 23, 2014, 13:28 

#6 
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Bruno Santos
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Unfortunately, I don't know the answer.
But I do have the vague idea that this has been asked here in the forum a few times in the past... Good luck! Best regards, Bruno 

March 24, 2014, 06:45 

#7  
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Paul Weber
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Hello sina,
I think you do not need a block coupled solver since your equations decouple. Quote:
Code:
0 = dk/dt + d/dx(UT) = dk/dt  dT/dt = dk/dt + d/dx(Uk) Code:
dT/dt + d/dx(UT) = 0 dk/dt + d/dx(Uk) = 0 Paul 

March 27, 2014, 12:47 

#8  
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Quote:
but what if I wanted to solve these two quantity together,I mean if I want k be under effect of Quantity T,Do you have any idea? 

April 3, 2014, 07:44 

#9 
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Paul Weber
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Dear Sina,
the nature of your equations is such that T and k decouple, i.e. they have no influence on each other. Reformulations of the system and it's simulation will never show dependence of T and k on each other, simply because it does not exist. However, if the underlying physics modeled by your system indeed imply a coupling, the only way to get it included is to redo the modeling in a proper way and thus derive a new, then coupled, equation system. In that case, the coupled system can be written as Code:
dT/dt + d/dx(UT) = f(k) dk/dt + d/dx(Uk) = g(T) Best, Paul 

April 3, 2014, 11:12 

#10  
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Quote:
dT/dt + d/dx(Uk) = 0 dk/dt + d/dx(UT) = 0 how can I solve this? I was thinking to define a vector a(T k2) and a'(k T) and then solve da/dt + da'/dx = 0 do you know how can I implement this in openfoam? Thanks in advance, Sina 

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