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Forum: CFX

September 2, 2013, 17:20

Replies: 10

Natural convection on a PCB's heat sink (with CFX)

Views: 4,739

Posted By elcino

Can I use a formula for density? I can...

Can I use a formula for density?

I can easily find it for air right?

Forum: CFX

September 2, 2013, 17:11

Replies: 10

Natural convection on a PCB's heat sink (with CFX)

Views: 4,739

Posted By elcino

Got it, so I can use Air at 25 °C and enable...

Got it, so I can use Air at 25 °C and enable gravity and Boussinesq model.

My results give high temperature i guess because, air in not having a real convection movement. The model is almost what...

Forum: CFX

September 2, 2013, 16:31

Replies: 10

Natural convection on a PCB's heat sink (with CFX)

Views: 4,739

Posted By elcino

Hi Bruno, so, I had already used the...

Hi Bruno,

so, I had already used the Boussinesq approximation with a reference temperature the inlet temperature. I've solved the convergence problem, it was about the boundaries conditions, I've...

Forum: CFX

September 2, 2013, 10:06

Replies: 10

Natural convection on a PCB's heat sink (with CFX)

Views: 4,739

Posted By elcino

Natural convection on a PCB's heat sink (with CFX)

Good morning colleagues,

I want to simulate the natural convection inside a PC case which is using an heat sink to dissipate the heat produced by the CPU. The Pc is fan-less (no air is forced...

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