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Step function for temperature equation

Posted 28 giu 2018, 04:51 GMT-4 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 5 lug 2018, 05:37 GMT-4
Johan Cazals
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Posted: 6 years ago 5 lug 2018, 05:37 GMT-4
Updated: 6 years ago 6 lug 2018, 08:24 GMT-4

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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