THERMAL ANALYSIS(FACADE DETAIL) USING ADIABATIC CONDITIONS

[Anonymous]

Hi Everyone,

In the attached images, I want to do a thermal analysis of a portion of facade detail in 3d. The analysis mainly focuses on mullion and transom junction. At present these simulations are being done using facade specific 2d software like Therm, Frame simulator, Flixo, etc. Using Fusion 360, I want to analyze the same junction in 3 dimensional way. 

    I want to quantify the amount of heat that enters or exits the facade system/ outer wall/ curtain wall of a building. 

CONDITIONS:

A - I assume the outside air temperature to be 0 degree C and the interior room temperature to be 20 degree C. 

B - There is no direct contact between outer and inner environment. The section of the detail acts as adiabatic.

C - The temperature is evenly distributed on inner and outer environment (20 & 0 degree respectively). The only medium is the facade itself which as unventilated air cavities too.

D - The thermal load applicable are conduction, convection and radiation.

E - Mode of thermal simulation : Steady state. 

QUERIES:

1 - How can I deal with such adiabatic conditions? What are the appropriate ways to use adiabatic conditions in        Fusion 360? 

2 - How shall I deal with air cavities in terms of heat flow?

3 - Can someone tell proper steps/ procedure to deal with such thermal simulations?

I would appreciate an earliest response.

Deepak Singh Dhami

[John_Holtz]

Hi @Anonymous . Welcome to Fusion simulation.

1. How can I deal with such adiabatic conditions? What are the appropriate ways to use adiabatic conditions in Fusion 360? For adiabatic faces (faces with no heat flow in or out of the face), you do nothing. Since there is no load to add or remove heat, and no elements to conduct the heat away, the face is adiabatic.
2. How shall I deal with air cavities in terms of heat flow? You cannot, at least not very accurately. Real air cavities transfer the heat because of air currents. The best that you can do is model the air as a solid, and then determine (though experiments) what thermal conductivity will simulate the air current, if that is even possible. (Or, perhaps a search engine will have some theoretical papers on how to model the convective effects using a solid.)