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Step function for temperature equation

Posted Jun 28, 2018, 4:51 a.m. EDT Heat Transfer & Phase Change, Modeling Tools & Definitions, Parameters, Variables, & Functions 1 Reply

Matthew Hunt
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I wish to solve a temperature equation where the thermal diffusivity is a step function. If I could get a way of inputting this it would be brilliant;

Ideally I would like something like:

Cheers

Mat

1 Reply Last Post Jul 5, 2018, 5:37 a.m. EDT
Johan Cazals
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Posted: 6 years ago Jul 5, 2018, 5:37 a.m. EDT
Updated: 6 years ago Jul 6, 2018, 8:24 a.m. EDT

Define a step function "definitions - functions" Its name would something like step1, then you can call it in a variable of the form :
y=step1(x)
So what you need to do is to create two step functions, and then create your variable calling your step functions.
Then you go to your material, it has a thermal conductivity, volumic mass and heat capacity defined, the only thing here is to know in which term (k, rho or Cp) the step function is effective, because you know that thermal diffusivity is k/(rho.Cp)

Define a step function "definitions - functions" Its name would something like step1, then you can call it in a variable of the form : y=step1(x) So what you need to do is to create two step functions, and then create your variable calling your step functions. Then you go to your material, it has a thermal conductivity, volumic mass and heat capacity defined, the only thing here is to know in which term (k, rho or Cp) the step function is effective, because you know that thermal diffusivity is k/(rho.Cp)

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