Thermal Spreading Resistance Within
Isotropic and Compound Mediums
This Javascript application calculates the thermal spreading resistance for a flux applied to a circular portion of the upper surface of a circular disk, semi-infinite circular cylinder, or half-space. Solutions are available for a compound medium with two layers having different thicknesses and thermal conductivities, and an isotropic medium with constant properties throughout. For the finite disk cases, two boundary conditions for the lower surface are considered: a uniform film coefficient and a uniform temperature boundary condition.

The results for total one-dimensional conduction resistance, spreading resistance and total overall resistance are presented in both dimensional and dimensionless forms.

R* = 4 k1 a R

For a list of references and additional information, please follow this link


Instructions
  1. Click on the image below that best describes your problem
  2. When the required tables are loaded, enter all input values in the table on the left
  3. Browser will calculate when the Calculate button is clicked or when the number of significant digits is changes
  4. Depending on the speed of your machine and the number of terms, the solution may take a while to compute


Compound Circular Disk with
Convective Cooling

Isotropic Circular Disk with
Convective Cooling

Compound Circular Disk with
Uniform Temperature Boundary Condition

Isotropic Circular Disk with
Uniform Temperature Boundary Condition

Compound Circular Flux Tube

Isotropic Circular Flux Tube

Circular Source on Compound Half-Space

Circular Source on Isotropic Half-Space



Please send any comments to the MHTL Web Administrator pmt@mhtl.uwaterloo.ca

Last Updated November, 1997