# turbulentIntensityKineticEnergyInlet boundary condition

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 October 20, 2012, 16:04 turbulentIntensityKineticEnergyInlet boundary condition #1 New Member   Sagnik Join Date: Oct 2012 Posts: 27 Rep Power: 6 Dear all, I wonder what "value uniform 1; // placeholder" / "value uniform 200; // placeholder" mean in "turbulentIntensityKineticEnergyInlet" / "turbulentMixingLengthDissipationRateInlet" boundary condition ! The k and epsilon values can be solved from intensity and mixing length only. What does "value uniform" do ? Thanks for the input. Sagnik PS: Boundary condition specifications: inlet { type turbulentIntensityKineticEnergyInlet; intensity 0.05; // 5% turbulence value uniform 1; // placeholder } inlet { type turbulentMixingLengthDissipationRateInlet; mixingLength 0.005; // 5 mm value uniform 200; // placeholder }

 October 20, 2012, 16:35 #2 Super Moderator   Bruno Santos Join Date: Mar 2009 Location: Lisbon, Portugal Posts: 9,744 Blog Entries: 39 Rep Power: 103 Greetings Sagnik and welcome to the forum! The need for the line with "value" is explained in the comment: it's merely a placeholder! In the sense that: The dictionary reading system requires that this line is present. You can try removing it and you'll see that the solver will complain about the missing entry. This "value" keyword is later used to store the fields that have been calculated in the next iterations! Best regards, Bruno HakikiCanakkaleli likes this. __________________ OpenFOAM: FAQ | Getting started Forum: How to get help, to post code/output and forum guide What am I doing/planning: blog/wiki Read this before sending me PM

 October 21, 2012, 13:22 #3 New Member   Sagnik Join Date: Oct 2012 Posts: 27 Rep Power: 6 Thanks a lot, Bruno .....

 December 11, 2015, 19:36 #4 New Member   Shahabeddin Join Date: Oct 2015 Location: Iran Posts: 16 Rep Power: 3 Dear Friends I faced with following error using "turbulentIntensityKineticEnergyInlet" BC: Code: ```--> FOAM FATAL IO ERROR: keyword value is undefined in dictionary "/home/shahabeddin/Desktop/elbow/0/k.boundaryField.velocity-inlet-6" file: /home/shahabeddin/Desktop/elbow/0/k.boundaryField.velocity-inlet-6 from line 40 to line 42. From function dictionary::lookupEntry(const word&, bool, bool) const in file db/dictionary/dictionary.C at line 442. FOAM exiting``` and the definition is: Code: ``` velocity-inlet-6 { type turbulentIntensityKineticEnergyInlet; intensity 0.05 //5% turb inten value uniform 0.0054; }``` should I remove "value" keyword? or any other solution is exists? I am using OpenFoam 3.0

December 12, 2015, 03:03
#5
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Nima Samkhaniani
Join Date: Sep 2009
Location: Tehran, Iran
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you missed semicolone after intensity line

Quote:
 intensity 0.05;
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