Gamma ReTheta Transition Model

arkadu · January 7, 2012, 03:41

hi..i am fresher for CFD..what is the solution for error..Gamma ReTheta Transition Model must have valid field function set for free stream edge definition..

Josh · January 10, 2012, 13:25

You must define the freestream edge so that the freestream momentum thickness Reynolds number can be transported into the boundary layer.

Create a field function (Tools > Field Function).

Define the field function. The Help file of CCM+ uses this as an example:$WallDistance > 0.005?1:0
(if the wall distance is larger than 5 mm, then that is the freestream; otherwise, it's the boundary layer).

In Continua > Physics > Models > Gamma ReTheta, set the Free Stream Edge to your user-defined field function.

January 7, 2012, 03:41	Gamma ReTheta Transition Model	#1
arkadu New Member Jyothiprakash Join Date: Jan 2012 Posts: 1 Rep Power: 0	hi..i am fresher for CFD..what is the solution for error..Gamma ReTheta Transition Model must have valid field function set for free stream edge definition..

January 10, 2012, 13:25		#2
Josh Senior Member Joshua Counsil Join Date: Jul 2009 Location: Seattle, Washington Posts: 359 Rep Power: 5	You must define the freestream edge so that the freestream momentum thickness Reynolds number can be transported into the boundary layer. Create a field function (Tools > Field Function). Define the field function. The Help file of CCM+ uses this as an example:$WallDistance > 0.005?1:0 (if the wall distance is larger than 5 mm, then that is the freestream; otherwise, it's the boundary layer). In Continua > Physics > Models > Gamma ReTheta, set the Free Stream Edge to your user-defined field function. arkadu likes this.

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