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April 26, 2011, 11:04 
solidWallMixedTemperatureCoupled and directMappedWall

#1 
Senior Member
Mirko Vukovic
Join Date: Mar 2009
Posts: 159
Rep Power: 9 
Hi,
To better understand chtMultiRegionSimpleFoam, I built a simple 2region heat conduction problem (solid/solid) using compressible::turbulentTemperatureCoupledBaffle coupling on the interface. This ran OK. I then decided to try the solidWallMixedTemperatureCoupled coupling. That was the only change in the input files. Partial output of `git diff': Code:
bottomRegion_to_topRegion {  type compressible::turbulentTemperatureCoupledBaffle; + type solidWallMixedTemperatureCoupled; neighbourFieldName T; K K; value uniform 300; I now get an error related to directMappedWall that I do not understand. Code:
> FOAM FATAL IO ERROR: Unknown patchField type solidWallMixedTemperatureCoupled for patch type directMappedWall So, is the documentation incorrect? What should I change the wall type to be? Thanks, Mirko 

July 20, 2012, 09:48 
solidWallMixedTemperatureCoupled and directMappedWall

#2 
New Member
zurg
Join Date: Jun 2011
Posts: 8
Rep Power: 7 
Hi Mirko,
it sems that "solidWallMixedTemperatureCoupled" is no more a valid PachField, at least from OF 2.0. Valid patchField types are : 86 ( MarshakRadiation MarshakRadiationFixedT advective alphaSgsJayatillekeWallFunction alphaSgsWallFunction alphatJayatillekeWallFunction alphatWallFunction buoyantPressure calculated codedFixedValue compressible::epsilonWallFunction compressible::kqRWallFunction compressible:megaWallFunction compressible::temperatureThermoBaffle1D<constSolid ThermoPhysics> compressible::temperatureThermoBaffle1D<expoSolidT hermoPhysics> compressible::turbulentHeatFluxTemperature compressible::turbulentMixingLengthDissipationRate Inlet compressible::turbulentMixingLengthFrequencyInlet compressible::turbulentTemperatureCoupledBaffle compressible::turbulentTemperatureCoupledBaffleMix ed compressible::turbulentTemperatureRadCoupledMixed cyclic cyclicSlip directMapped directMappedField directMappedFixedInternalValue directMappedFixedPushedInternalValue directionMixed empty externalWallHeatFluxTemperature fan fanPressure fixedEnthalpy fixedFluxPressure fixedGradient fixedInternalEnergy fixedInternalValue fixedPressureCompressibleDensity fixedValue freestream freestreamPressure gradientEnthalpy gradientInternalEnergy greyDiffusiveRadiation greyDiffusiveRadiationViewFactor htcConvection inletOutlet inletOutletTotalTemperature mixed mixedEnthalpy mixedInternalEnergy muSgsUSpaldingWallFunction mutLowReWallFunction mutURoughWallFunction mutUSpaldingWallFunction mutUWallFunction mutkRoughWallFunction mutkWallFunction nonuniformTransformCyclic oscillatingFixedValue outletInlet outletMappedUniformInlet partialSlip processor processorCyclic rotatingTotalPressure selfContainedDirectMapped sliced slip symmetryPlane syringePressure timeVaryingMappedFixedValue timeVaryingTotalPressure timeVaryingUniformFixedValue totalFlowRateAdvectiveDiffusive totalPressure totalTemperature turbulentInlet turbulentIntensityKineticEnergyInlet uniformDensityHydrostaticPressure uniformFixedValue wallHeatTransfer waveTransmissive wedge wideBandDiffusiveRadiation zeroGradient ) 

July 31, 2012, 11:16 

#3 
New Member
Join Date: Jul 2012
Posts: 21
Rep Power: 6 
hello guys,
I have just been informed from this thread that the BC solidWallMixedTemperatureCoupled is not included in the new OF !!! wow. So what do we use to couple the temperature on boundary between the fluid and the solid regions?? The zeroGradient does not seem to work for my case I would be grateful for any help. I am quite new with OF and I was reading around about this boundary condition  only to discover now that it does not exist any more! cordially, giorgos 

August 6, 2012, 12:40 

#4  
New Member
zurg
Join Date: Jun 2011
Posts: 8
Rep Power: 7 
Hi,
don't worry, the BC has just changed the name , now you can choose: compressible::turbulentTemperatureCoupledBaffle compressible::turbulentTemperatureCoupledBaffleMix ed Quote:


August 8, 2012, 04:09 

#5 
New Member
Join Date: Jul 2012
Posts: 21
Rep Power: 6 
thank you laplacian!
I had some doubts for using this BC in my case because it is laminar and the name of the BC itself suggests that it is for turbulence. Finally I used it and I switched off turbulence at /constant/fluid/*.* files thanks a lot! 

November 15, 2012, 08:30 

#6 
New Member
Markus Trompa
Join Date: Nov 2012
Location: Regensburg, Germany
Posts: 13
Rep Power: 5 
Hello turbulencious,
thank you very much for the information about the patchFields. As I am new to OF one question arises to me. How do U get the list of all the patchFields? Is there any trick or did U collect them al l by your own? Thanks Markus 

November 15, 2012, 08:35 

#7 
New Member
Markus Trompa
Join Date: Nov 2012
Location: Regensburg, Germany
Posts: 13
Rep Power: 5 
Oh, sorry I just saw that I replied to U turbulencious instead of laplacian
The question is of course adressed at him. 

November 15, 2012, 08:48 

#8 
Senior Member
Aurelien Thinat
Join Date: Jul 2010
Posts: 156
Rep Power: 8 
Hi Markus,
This list is an automatic output in case of an error. To get it many foamers use the "magic banana" trick : Modify the file in the 0 folder (U, p, T... whatever you want to modify) and you specify "type banana" in input. You'll have the list in the log file or in the terminal. 

November 15, 2012, 09:55 

#9 
New Member
Markus Trompa
Join Date: Nov 2012
Location: Regensburg, Germany
Posts: 13
Rep Power: 5 
Hi Aurelien,
Thank Your very much for your swift reply This Forum is really a good help to get started with OF and any kind of problem one can have. 

February 18, 2013, 02:19 

#10 
Senior Member
Vishal Nandigana
Join Date: Mar 2009
Location: Champaign, Illinois, U.S.A
Posts: 208
Rep Power: 10 
Dear Foamers,
I was trying to understand the electric potential distribution between two different mediums of different permittivity. The problem is similar to heat conduction between 2 solids of different conductivity. I am developing a solver similar to chtMultiRegionFoam. I have couple of queries regarding OF boundary conditions, 1. What does "solidwallmixedtemperaturecoupled" or the latest "compressible::turbulentTemperatureCoupledBaffleMi xed" physically mean !! Can you let me know the mathematical equation of this BC. 2. Also, I have to implement the following BC A1*grad(Phi) .n1 (solid 1) + A2*grad(Phi) .n2 (solid 2) = C where A1 and A2 are the permittivities in solid 1 and solid 2 resp. n1, n2 are unit vectors directed outward to their respective solids. C is a constant. Please let me know what type of BC has to be used. Thanks Regards Vishal 

August 22, 2014, 20:23 

#11  
New Member
Cliff
Join Date: Aug 2014
Posts: 10
Rep Power: 3 
Quote:
Would it be possible for you to share your "simple 2region heat conduction problem (solid/solid)" case? I am having problems learning this: http://www.cfdonline.com/Forums/ope...wosolids.html Thank you, Cliff 

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