Default Units CFX ( K and C)

ahmadbakri · November 26, 2014, 05:20

Hi All,

Now CFX always use K generally as a default option to view temperatures in both post and solver. I know how to change a certain plot in post from K to C. The question I have is how to set that for the solver ( for user points) and even when I run a session file that measures temperatures at different locations of my model it always show in K. Now Under CFX post--Options---Solution Units I found that the Temperature is set to K. Does anybody know how to change that to C??

Regards

Opaque · November 26, 2014, 08:47

Unfortunately, that is not supported by the ANSYS CFX Solver.

CFD-Post only changes the temperature units for display, and it has special handling for temperature differences, while the solver needs a consistent temperature unit for calculations of all sorts. Using absolute temperature avoids the confusion of when 1 [K] is 1 unit of change or 1 absolute unit.

evcelica · November 26, 2014, 11:09

One way to do it would be to make an expression (TemperatureC) = Temperature + 273.15[K]
Then display this expression instead of Temperature.

November 26, 2014, 05:20	Default Units CFX ( K and C)	#1
ahmadbakri New Member ahmad bakri Join Date: May 2010 Posts: 20 Rep Power: 15	Hi All, Now CFX always use K generally as a default option to view temperatures in both post and solver. I know how to change a certain plot in post from K to C. The question I have is how to set that for the solver ( for user points) and even when I run a session file that measures temperatures at different locations of my model it always show in K. Now Under CFX post--Options---Solution Units I found that the Temperature is set to K. Does anybody know how to change that to C?? Regards

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November 26, 2014, 08:47		#2
Opaque Senior Member Join Date: Jun 2009 Posts: 1,804 Rep Power: 32	Unfortunately, that is not supported by the ANSYS CFX Solver. CFD-Post only changes the temperature units for display, and it has special handling for temperature differences, while the solver needs a consistent temperature unit for calculations of all sorts. Using absolute temperature avoids the confusion of when 1 [K] is 1 unit of change or 1 absolute unit.

November 26, 2014, 11:09		#3
evcelica Senior Member Erik Join Date: Feb 2011 Location: Earth (Land portion) Posts: 1,167 Rep Power: 23	One way to do it would be to make an expression (TemperatureC) = Temperature + 273.15[K] Then display this expression instead of Temperature.