Learning Forum

[Edem930527]

Hello!

I'd like to simulate a transient thermodynamic problem.

I have a heat changer with cooling water and ethanol-water alloy. I'd like to add the alloy temperature and the time contact from an excel file. The simulation is 90 minutes and I determine the temperature every minute (inside this excel). 

How can I import this excel to Fluent?

[Keyur Kanade]

Excel can be used through workbench for driving input and output parameters. 

But in your case I think you will need to write UDF. 

Please check customization manual in help. 

 

[Edem930527]

I wrote a UDF, but I think it doesn't work.

I'd like 3D simulation, the start temperature is 351,3K (78°C) and then the temperature arises every sec.

Can you check it?

 

#include "udf.h"

DEFINE_PROFILE(temp, t, i)

{

real x[ND_ND];

real x0;

face_t f;

real time= CURRENT_TIME;

begin_f_loop(f, t)

{

F_CENTROID(x,f,t);

x0 = x[0];

if (time<1800)

F_PROFILE(f, t, i) = 351.3 + 0.01 * x0;

else

F_PROFILE(f, t, i) = 373;

}

end_f_loop(f, t)

}

[DrAmine]

You want the temperature to rise every second so why you are using the x-coordinate there. If your temperature profile is only time-dependent just read a transient table or transient profile for that

[Edem930527]

Thank you for your answer!

Can you write an example what you though?

Best regards,

Adam

[Keyur Kanade]

here is a example for profile

((sampleprofile transient 3 0)

(time

1

2

3

)

(u

10

20

30

)

)