Hi all,
I am working on a problem, in which hot fluid is flowing as a thin film and being cooled. I use two coupling PDEs to solve the film thickness and the temperature
∂H/∂t= ∇.F(H)
H ∂T/∂t=F(H).∇T+G(H,T)
Now I want to add a temperature controller to the model, so that after a time ts when temperature is below a threshold Tc, a surface crust is forming, with a thickness d = A (t-ts)^0.5, and when d=Q(H), I let F=0 and the flow stops in this region.
I have no idea how to implement this controller. It looks that this controller should be in the material frame because the crust also moves with the fluid, and use the events interface to identify the event of crust initiation. I searched the existing documents on process controller and events interface, but am still confused. Can someone give me some directions on how to do this?
Any help is greatly appreciated.
Jiangzhi
I am working on a problem, in which hot fluid is flowing as a thin film and being cooled. I use two coupling PDEs to solve the film thickness and the temperature
∂H/∂t= ∇.F(H)
H ∂T/∂t=F(H).∇T+G(H,T)
Now I want to add a temperature controller to the model, so that after a time ts when temperature is below a threshold Tc, a surface crust is forming, with a thickness d = A (t-ts)^0.5, and when d=Q(H), I let F=0 and the flow stops in this region.
I have no idea how to implement this controller. It looks that this controller should be in the material frame because the crust also moves with the fluid, and use the events interface to identify the event of crust initiation. I searched the existing documents on process controller and events interface, but am still confused. Can someone give me some directions on how to do this?
Any help is greatly appreciated.
Jiangzhi
