#1 2017-04-18 23:12:09

Humberto

Member

From: Ensenada, Mexico

Registered: 2012-10-15

Posts: 104

Website

[SOLVED] Thermal Flux through an insulated Wall

Hello, I am conducting a thermal analysis on a wall, I am trying to figure out the overall R value, I'm using the [mks units system] what units should RHO_CP have? (I assume J/kg °C but maybe J/m3 °C i am lost here because of the rho part.) and I am solving for FLUX_ELNO and FLUX_ELGA, What units do these fields have? (power/area?)

at the end I think I am integrating the Flux_Elno over the wall, to get total power, amount of energy that crosses the wall per unit of time.

Thanks in advance for any advice...

Last edited by Humberto (2017-05-16 19:23:19)

Humberto

Member

From: Ensenada, Mexico

Registered: 2012-10-15

Posts: 104

Website

Re: [SOLVED] Thermal Flux through an insulated Wall

Ok taking a look at TPLV07 I figured that Rho_Cp has units of [J/m^3 °K]

I am still trying to understand the nature of FLUX_ELNO

Anybody? please help

Last edited by Humberto (2017-04-19 20:38:39)

Humberto

Member

From: Ensenada, Mexico

Registered: 2012-10-15

Posts: 104

Website

Re: [SOLVED] Thermal Flux through an insulated Wall

I did the 3D model and have groups for the outside (2D) surface and the outside most layer (3d)

I calculated the FLUX_ELGA, FLUX_ELNO from The command CALC_CHAMP, and Over the outside 2D area it will not calculate it, but on the outer layer 3D it does.

A heat flux has W/m2 units, does this change on the 3D mesh? Am I getting a W/m3 result because I am using a 3D mesh?

I did an  integration afterwards with POST_ELEM INTEGRALE, over the 3D volume, the documentation is very small concerning what this command does. Is the result of this integral Watts? or W/m3?

Thanks for any information that you can provide.

Humberto