*** CAE program for heat conducting ***

Rogerio Fernandes Brito

Brazil, January, 16th, 2008.

Subject: CAE program for heat conducting

Which is the better CAE program to simulate the heat conducting in a block? I tried using FEMLAB 3.0a (3.0.0.228) from COMSOL, but the results had a big deviation! It happened with the CFX-v5.6 program too. The softwares are listed below:

FLUENT, ABAQUS v6.7, ANSYS CFX-v11.0, Flow3D or some another one. Thanks!

Details: I wanna simulate a sample (=cemented carbide tool) like that:

Total dimension of the sample (x, y, z): 0.0127 x 0.0127 x 0.0047 (m) = 1.27 x 1.27 x 0.47 (cm) = 12.7 x 12.7 x 4.7 (mm)

Dimension of the cavity with air (Pr = 0.70) (x, y, z) (for example, 10 times the dimension of the sample): 127.0 x 127.0 x 47.0 (mm)

Interval of acquisition of data = 0.222000 seconds

Initial temperature of the sample = 29.2 (ºC) = 302.35 K

Number of thermocouples = 4

Co-ordinated (s) of the (s) thermocouple (you are):

x= 0.0095 (m) y= 0.0035 (m) z= 0.0047 (m) x = 9.5 (mm) y= 3.5 (mm) z= 4.7 (mm)

x= 0.0043 (m) y= 0.0035 (m) z= 0.0047 (m) x = 4.3 (mm) y= 3.5 (mm) z= 4.7 (mm)

x= 0.0035 (m) y= 0.0089 (m) z= 0.0047 (m) x = 3.5 (mm) y= 8.9 (mm) z= 4.7 (mm)

x= 0.0065 (m) y= 0.0059 (m) z= 0.0047 (m) x = 6.5 (mm) y= 5.9 (mm) z= 4.7 (mm)

Area (s) (s) for the (s) heat flow (s) (the heat flux [W m^-2] is in the center of the square for the coordinate z=0.0 ):

xo= 0 x=0.0104

yo= 0 y=0.0104

zo= 0.0 z=0.0

About the sample: The values of thermal properties used to calculate these temperatures are 43.1 W/m.K and 14.8 x 10^-06

m²/s.

As boundary conditions, it was considered that all the faces were submitted to a constant convection heat transfer

coefficient (h = 20 W/m²K).

Rogério Fernandes Brito - Mechanical Engineering