Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
How To add Gravity in Conjugate Heat Transfer???
Posted 18.07.2010, 21:46 GMT-4 1 Reply
Please login with a confirmed email address before reporting spam
Hi I'm trying to add gravity to a problem with natural convection. But I don't know how.
Any help would be very apreciated
Any help would be very apreciated
1 Reply Last Post 19.07.2010, 02:42 GMT-4
Please login with a confirmed email address before reporting spam
Posted:
1 decade ago
Hi
I remember that I was very upset not finding the "gravity" click option when I started with Comnsol. But with COMSOL the rule is THINK Physics.
So gravity is a "Body Force" expressed as F=G*rho.smsld (in 3.5) and F=g_const*solid.rho in v4, F are in [N]. Where I usually define G as a constant G=1[lbf]/[lb] if it's earth gravity we talk about. "g_const" is predefined in V4. It's the same logic that loads are given as pressures p[Pa]=F[N]/(Area[m^2]
--
Good luck
Ivar
I remember that I was very upset not finding the "gravity" click option when I started with Comnsol. But with COMSOL the rule is THINK Physics.
So gravity is a "Body Force" expressed as F=G*rho.smsld (in 3.5) and F=g_const*solid.rho in v4, F are in [N]. Where I usually define G as a constant G=1[lbf]/[lb] if it's earth gravity we talk about. "g_const" is predefined in V4. It's the same logic that loads are given as pressures p[Pa]=F[N]/(Area[m^2]
--
Good luck
Ivar