Simulating Pulse in Ansys 1

[TucsonAz]

Has anyone simulates Pulse application (Semiconductor Laser) using Ansys. How do you input load as a function of time as I have power turned ON for 0.5sec and turned OFF for 0.5sec. I would like to see the temperature rise during Pulse operation.

Thanks.

 

[slava74]

Hi Tucson,
Probably, the best way to learn how to simulate transient thermal analysis is to read Transient Thermal Analysis chapter in Thermal Analysis Guide. Use *DIM command to specify TABLE and then fill it manually or through *TREAD command. All these steps can be done via Utility Menu-Parameters-Array Parameters-Define/Edit (manually) or: Utility Menu-Parameters-Array Parameters-Define/Edit (then)-Read From File (files are in *.dat or *.txt formats, one column is TIME another one is TEMP). Personally, I prefer to work with tables. For Temp vs. Time set Parameter Type as Table then specify # of rows and set # of columns to 1. In the row variable (Var 1) field type TIME, then fill temperature vs. time steps as you wish. Good luck.

 

[TucsonAz]

Can I input Load and time in a table for simulation Pulse application. The load is the heat input. I would like to see the temperature rise when the heat input is turned ON for 0.5sec and turned OFF for 0.5sec.

Thanks

 

[slava74]

Sorry for late answers, I was relocting, switching jobs and blah-blah-blah...

This issue is about temperature profile as a function of time. I can harder understand it in terms of ON and OFF. For instance, OFF means that a heater has no power input? In this case you would better take into an account the transient process since a heater still has a temperature (declining, but m.b sufficient enough to keep your system warming up). There are several other scenarios depending on the particular system, but most of them utilize transient analysis. I would use here the iterative method which is developed good enough in ANSYS, using temperature or generated heat as a parameter.
GL.

 

[mueschen]

Here a input for a pulse load called 'pulselo'
via table,
applying a TEMPerature on a node:

*DIM,pulselo,TABLE,4,1, ,TIME

PULSELO(1,0,1) = 0 ! time=0 load=0
PULSELO(2,0,1) = 1 ! time=1
PULSELO(2,1,1) = 222 ! load=222
PULSELO(3,0,1) = 2 ! time= 2
PULSELO(3,1,1) = 222 ! load=222
PULSELO(4,0,1) = 3 ! time=3 load=0

BF,123,TEMP, %pulselo% ! insert the table load on Node 123

cheers,
saber
BFLIS, ALL ! List bodyforce load on nodes