Forced and natural convection using ABAQUS
Forced and natural convection using ABAQUS
(OP)
I've done a bit of work in ABAQUS in the past, but all has been some form of mechanical loading. I have now been asked to characterize the differences between two proposed heating bath systems. Essentially I have this:
Heated cylindrical bath (either molten salt or sand).
Heat flux into the bottom to maintain bath at 500 C.
Ambient room temp 22 C.
Bath insulated on all sides, open on top.
Natural convection in the air above the bath.
Possible forced convection in the bath media (eventually would like to add this in).
K(salt)=0.42 W/m*K
K(sand)=1.38 W/m*K
H(air)=40W/m^2*K
I am trying to evaluate the two different materials, and assuming a constant 500 degrees C input on the bottom, fully insulated sides, natural convection out through the top - what is the difference in surface temperature, and the temperature gradient from using these two different bath media?
If this were all conduction, I wouldn't have a problem, but I can't seem to figure out how to make convection in an ABAQUS simulation.
Heated cylindrical bath (either molten salt or sand).
Heat flux into the bottom to maintain bath at 500 C.
Ambient room temp 22 C.
Bath insulated on all sides, open on top.
Natural convection in the air above the bath.
Possible forced convection in the bath media (eventually would like to add this in).
K(salt)=0.42 W/m*K
K(sand)=1.38 W/m*K
H(air)=40W/m^2*K
I am trying to evaluate the two different materials, and assuming a constant 500 degrees C input on the bottom, fully insulated sides, natural convection out through the top - what is the difference in surface temperature, and the temperature gradient from using these two different bath media?
If this were all conduction, I wouldn't have a problem, but I can't seem to figure out how to make convection in an ABAQUS simulation.





RE: Forced and natural convection using ABAQUS
RE: Forced and natural convection using ABAQUS
Natural convection usually varies with the temperature difference to the power 1/3. There's no way of inputting this into Abaqus so you'll have to prepare a table of surface temperature against coefficient and input the values that way. You can also add the radiation term to that table or just apply it via surface radiation in the interaction module.
Tata but not yet tara
RE: Forced and natural convection using ABAQUS
However, I'll work on the table you mention and see if I can get something to work that way. Thanks for the tip.