Odd problem linking variables with field functions

JRosser_Purdue · December 9, 2022, 20:42

I am trying to model particle flow where the particle cohesiveness is linked to the temperature of the particle. I want to make it so that the cohesive work value is 0 when the particles are above 0 Celsius.

The field function I created in place of the cohesive work value is defined as:
(${ParticleTemperature} >= 273.15) ? 0

300)

I get this error:
"Unable to compute field function CW_T on "ContactCloud". Please check that function is defined here."

I cannot find any information about the contact cloud online or in the user manual.

I can make the cohesive work value dependent on other contact parameters, but that does not help me as it must be dependent on the particle temperature.

fluid23 · December 12, 2022, 13:31

It looks like you maybe have extra braces. Whatever you copied in shows a

where there should be ':'. Also, do you need the one after 273.15?

It sounds like this is part of a larger function, right? Consider creating a separate variable for this and call that in the larger function. It will be easier to troubleshoot.

I don't think your problem is 'ContactCloud' or whatever that is (I can't find it either). I think it's just a syntax error, but I don't see the full picture of what you are doing.

December 9, 2022, 20:42	Odd problem linking variables with field functions	#1
JRosser_Purdue New Member John Rosser Join Date: Dec 2022 Posts: 1 Rep Power: 0	I am trying to model particle flow where the particle cohesiveness is linked to the temperature of the particle. I want to make it so that the cohesive work value is 0 when the particles are above 0 Celsius. The field function I created in place of the cohesive work value is defined as: (${ParticleTemperature} >= 273.15) ? 0300) I get this error: "Unable to compute field function CW_T on "ContactCloud". Please check that function is defined here." I cannot find any information about the contact cloud online or in the user manual. I can make the cohesive work value dependent on other contact parameters, but that does not help me as it must be dependent on the particle temperature.

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December 12, 2022, 13:31		#2
fluid23 Senior Member Matt Join Date: Aug 2014 Posts: 947 Rep Power: 19	It looks like you maybe have extra braces. Whatever you copied in shows a where there should be ':'. Also, do you need the one after 273.15? It sounds like this is part of a larger function, right? Consider creating a separate variable for this and call that in the larger function. It will be easier to troubleshoot. I don't think your problem is 'ContactCloud' or whatever that is (I can't find it either). I think it's just a syntax error, but I don't see the full picture of what you are doing.