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I want to know meaning of CFX Expression Language for numerical analysis of plasma.

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Old   March 10, 2020, 08:41
Default I want to know meaning of CFX Expression Language for numerical analysis of plasma.
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Won-Ho Lee
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I am now conducting an analysis of thermal plasma.
But I don't know the meaning of CFX Expression Language as follows.
Please teach me the meaning of CFX Expression Language.

-Ignition Factor: 1e7[W*m^-3*K^-1]*ShapeRad*step(50-aitern)*step(aitern-10)*step(Ignition Target-T)
-Igntion Source: Ignition Factor*(Ignition Target-T)
-NetEmission: 3000[W*m^-3]*(exp(FNetEmission*T)-exp(FNetEmission*30[C])
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Old   March 10, 2020, 10:06
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Read Chapter 13: CFX Expression Language (CEL) and Chapter 14: Functions in ANSYS CFX of Ansys CFX Reference Guide. These chapters contain everything you need to know about CFX Expressions.
You can download Reference Guide here:
http://read.pudn.com/downloads500/eb...64/cfx_ref.pdf
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Old   March 12, 2020, 21:52
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Thank you for your answer.
Howerver, I want to know physical meaning about CFX Expression language(Especially, Ignition Factor).
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Old   March 13, 2020, 01:49
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CFX Expression language is just a way of defining functions and accessing data out of CFX. To learn CFX Expression language refer to the CFX Reference Guide.

But I have no idea what the "Ignition Factor" variable you defined is. You defined it, so it is what you defined it to be. Or if you got the equation from somebody else then ask whoever you got it from.
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Old   March 13, 2020, 03:16
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This is just expression name. You can rename "Ignition Factor" to "Lalala", replace everywhere in project "Ignition Factor" with "Lalala" and everything work fine. It is not something hardcoded into CFX.
You should ask person who create these expressions about expressions logic.
Finally these expressions are incomplete, these expressions refer to other user expressions, like ShapeRad and FNetEmission. Without them expressions didn`t work at all.
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