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Contributor
p.hammer
Posts: 19
Registered: ‎03-14-2013

external heat ransfer coeff - Air ?? What parameter

153 Views, 2 Replies
04-19-2013 12:27 AM

HI everybody,

 

new question? 

 

in 3d you can set up a mold block and set external heat transfer coeff. Standard ist Air. But what value is Air?

Does anbybody know?

 

greets Philipp

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Contributor
p.hammer
Posts: 19
Registered: ‎03-14-2013

Re: external heat ransfer coeff - Air ?? What parameter

04-22-2013 10:29 PM in reply to: p.hammer

So everybody,

 

I got some Infos:

 

not moving air : 2 W/m^2K

Room air :  5 W/m^2K

slight air movement: 10 W/m^2K ( I think this is passive convection)

stronger air movement: 20 - 40 W/m^2K (active convection)

 

But I still would like to know what parameter MOldflow uses for calculation when I set it to AIR.

 

Hope somebody knows.

 

Greetings Philipp

 

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Product Support
nordhb
Posts: 464
Registered: ‎03-23-2009

Re: external heat ransfer coeff - Air ?? What parameter

04-23-2013 10:22 PM in reply to: p.hammer

Hi Philipp,

regarding the Mold Block (3D) Air property:
Air uses the ambient temperature in the process controller (default is 25C).
You can change it at:
Process Settings > Advanced Options...
Process Controller : Edit...
tab Temperature Control

The Heat Transfer Coefficient, HTC, for Mold Block (3D) Air property is with the value of 10W/m2-C.

Regards,
Berndt



Berndt Nordh
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