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I want to know meaning of CFX Expression Language for numerical analysis of plasma. |
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March 10, 2020, 08:41 |
I want to know meaning of CFX Expression Language for numerical analysis of plasma.
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#1 |
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Won-Ho Lee
Join Date: Oct 2018
Location: South Korea
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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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March 10, 2020, 10:06 |
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#2 |
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Join Date: Nov 2015
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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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March 12, 2020, 21:52 |
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#3 |
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Won-Ho Lee
Join Date: Oct 2018
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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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March 13, 2020, 01:49 |
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#4 |
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Glenn Horrocks
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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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Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum. |
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March 13, 2020, 03:16 |
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#5 |
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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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