CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   FLOW-3D (http://www.cfd-online.com/Forums/flow-3d/)
-   -   S2P Modelling (http://www.cfd-online.com/Forums/flow-3d/27239-s2p-modelling.html)

AMP October 2, 2008 15:48

S2P Modelling
 
I want to model mold filing of a bar mold and solidification in it by a semisolid alloy. I successfully modeled it for a 2D geometry but I don't know why I can't model solidification for a 3D bar mold; in other word I can not define heat transfer to it and I don't why it doesn't matter how much I increase heat transfer to fluid1. I am very confused. please help me anyone how knows. thanks.

DTS October 6, 2008 18:49

Re: S2P Modelling
 
Dear AMP,

The heat transfer will work whether it is 2D or 3D. If this is a solid to fluid heat transfer in which you are referring you will want to do the following:

1. Activate heat transfer and either fixed temperature solid or full energy equation. If the full energy equation is activated you will need to also define the thermal capacity*density of the solid and the thermal conductivity. Whether fixed temperature or conduction you need to also define an initial temperature for the solid.

2. For the fluid you need to also define the heat capacity, the thermal conductivity and an initial temperature.

3. Heat transfer coefficient for liquid to surrounding solid (mold)

4. Heat transfer coefficient for solidified liquid to surrounding solid

I hope this helpss, DTS


AMP October 7, 2008 01:40

Re: S2P Modelling
 
Dear DTS do you have any information about "heat transfer to fluid 1" and "heat transfer to solid fluid 1"? help me know these two terms better. I want to model semisolid flow behaviour.as you know semisolid slurries do not have such fluidity like melts and iquids; in other hand they have higher viscosities. my problem: FLOW3D "fluidity simulation"s of my semisolid slurry is not close to my experimental results, at all. tell me your ideas and any usefull suggestion.

AMP October 22, 2008 12:49

Re: S2P Modelling
 
solid fraction vs. time has an increasing slope with consuming time. but I don't know why after fs= 0.68 it decreases amazingly; it is a serious problem for me because my finish condition is solid fraction=1 and it never reaches the end. any useful help is appreciated.

Michael Barkhudarov October 23, 2008 09:25

Re: S2P Modelling
 
What is the metal cooling to?

ivan February 17, 2009 10:53

Re: S2P Modelling *NM*
 


All times are GMT -4. The time now is 19:42.