Learning Forum

[elsaeed]

I want to simulate an energy source term describe the solidification and melting process of phase change material encapsulated in spherical capsules and packed in a thermocline tank.

 

[elsaeed]

the term source is   s= - d((1-phi)*rho* DELTA H))/dt, 

 

[elsaeed]

 

[Rob]

What's the question? Source terms are covered in the UDF manual. 

[elsaeed]

WHEN I ENTER THE SOURCE TERM OF THE LATENT HEAT THE TEMPERATURE DISTRIBUTION NO CHANGED, IT MUST BE INCREASED TO A CERTAIN VALUE AND THEN REMAINS CONSTANT DURING PHASE CHANGE PROCESS AND FINALLY INCREASED. BUT WHEN ENTER THIS UDF SOURCE THERE IS NO DIFFERENCE IN TEMPERATURE DISTRIBUTION. WHY?

 

[elsaeed]

SOURCE TERM OF LATENT HEAT WHICH DESCRIBE THE MELTING AND SOLIDIFICATION PROCESS OF ENCAPSULATED PHASE CHANGE MATERIAL INSIDE THERMOCLINE TANK. 

[elsaeed]

 s= - d((1-phi)*rho* DELTA H))/dt, 

phi IS the porosity of the packed bed,

rho is the solid density of pcm,

DELTA H is the latent heat content which is a function of temperature which is varies with time

dt is the physical time step

so, HOW can I write this udf source correctly?

 

 

[Amine Ben Hadj Ali]

Edit moving to fluid.

[Amine Ben Hadj Ali]

Did you check customization Manual as well as the melting solidification model?