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input of a variable which is changing
Posted Mar 19, 2024, 11:53 a.m. EDT 1 Reply
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Hello
I am dealing with heat transfer of a food product placed in a blast chiller. I have to input the external temperature of the chiller/ temperatuer of the cool air. but it is changing its not a single value like when i open a door to put the sample it increases say to -10 and then later it goes -20, -30 until it stabilizes say to -35. how do i input thi sin comsol? please help. thanks
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Hi Anjelina,
I suggest that you use an Interpolation function for this purpose. You can use linear interpolation or some other interpolation function to get the values between the entered times and temperatures that you specify in the table in the Settings window for the Interpolation function. Use degC (degrees C) as the unit for the function and s (seconds) as the unit for the argument, for example.
With the Interpolation function's default name, int1, then add a Temperature boundary condition to the boundary or boundaries that represent the opened door. There you enter int1(t) as the temperature, which will then be interpolated according to your entered values during a time-dependent simulation.
Best regards,
Magnus