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September 4, 2014, 03:42 
TNE2Solver output

#1 
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Saiteja
Join Date: Aug 2014
Posts: 13
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The tne2 euler and NS solver output doesnot have variable like mass fraction of the different species. how to add these to the output list ? Also, if some one can confirm what the variables conservative 110 actually denote/mean, it will be very helpful.


September 5, 2014, 04:40 

#2  
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Facundo
Join Date: Jun 2012
Posts: 22
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Quote:
I was looking at the source files, but I have to say that I don't really have experiences in programing so just trying to give my opinions and hoping someone with more experiences to give their suggestions. I tried to run the tutorial case for TNE2 and had Conservative_1 to 7. This is because in the tutorial the N2 model was used so there are two species. Therefore, in my opinions, after having a look in the source files: Conservative_1: density Conservative_2: density*Mass Fraction Species 1 Conservative_3: density*Mass Fraction Species 2 (from Conservative_2 to Conservative_2+n should depend on your number of species) Conservative_4: density*VelocityX Conservative_5: density*VelocityY (depending on the dimension of the problem) and in the case of the tutorial, the last two conservative parameters should be: Conservative_6: density*Mixture total energy Consevative_7: density*Vibrationelectronic energy These are my "feelings" about what the solution variables should be, so hoping some else with more experiences can give the right answer!! Cheers!! Facundo 

September 9, 2014, 13:07 

#3 
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Sean R. Copeland
Join Date: Jan 2013
Posts: 40
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Hello Saitej and Facundo,
The TNE2 outputs are as follows: Conservative_1  Density of species '1' ... Conservative_nSp  Density of species 'nSpecies' Conservative_nSp+1  Xmomentum Conservative_nSp+2  Ymomentum (Conservative_nSp+nDim)  Zmomentum Conservative_nSp+nDim+1  Total energy per unit volume Conservative_nSp+nDim+2  Vibel. energy per unit volume So, for example, if you are running a 3D simulation with the N2 gas model, you should have 2+3+2=7 conserved variables that follow the mapping above. Similarly, if you are running the 5 species air gas model in 2D, you should have 5+2+2 = 9 conserved variables. To acquire the mass fractions, you must do a postprocessing step to locally sum all the densities to get the mixture density, then divide the species density by the mixture density. There are also primitive variables (Pressure, Temperature, etc.) that are printed to the output file for convenience, and they should be labeled clearly. Hope that helps, Sean 

September 11, 2014, 08:23 

#4  
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Facundo
Join Date: Jun 2012
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Quote:
thank you very much for the explanation, it is really clear!!! Facundo 

January 28, 2015, 00:23 

#5  
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Sachchit Vekaria
Join Date: Dec 2013
Posts: 18
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Quote:
I have been reading the paper "AdjointBased GoalOriented Mesh Adaptation for Nonequilibrium Hypersonic Flows" and also the "Multidimensional Simulation of Plasma in Argon through a Shock in Hypersonic Flow". In both the paper momentum equation and energy (/vibrational) is solved for each specie. I have a doubt that by solving those equations we should get momentum for each specie and same goes for Energy (/vibrational), mach number and so on. I am new to plasma flows. So pardon me if this question is silly. And if there is some way to calculate all the mentioned properties from those given conservative variables kindly let me know. Thanks in Advance, Sachchit 

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output data, tne2 euler, tne2 navierstokes 
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