These online calculation pages
implement heat transfer models developed by the
Microelectronics Heat Transfer Laboratory at the University of Waterloo.
These models are accessed through a CGI interface and require the use of
a forms-capable browser. New models will be added to this site as soon
as they are completed.
- NEW!
WebMETA Online Demo
Based on the successful META (MicroElectronic Thermal Analyzer) program,
this application allows the user to define a circuit board, then outputs
graphs of temperature, velocity, heat flux and more. This demo has limited features,
but is fully functional. Must have Netscape 4.0 or greater.
- Under Construction!
Effective Conductivity Model for Rectangular Heat Sources
This model predicts effective conductivity from a rectangular
heat source, based on the composition of the substrate and boundary
conditions on the source. Must use Netscape 3.0 or greater.
-
Natural Convection Model for Circular and Square-Finned
Annular Heat Sinks
Based on the Ph.D. research of
C.S. Wang,
this model predicts heat transfer
from natural convection horizontal annular heat sinks.
The online model
incorporates both fin efficiency and radiation functions.
-
Natural Convection Model for Rectangular Heat Sinks
This model predicts heat transfer
from natural convection rectangular heat sinks.
The online model
incorporates a fin efficiency function, and allows for both single and
back-to-back configurations.
-
Thermal Fluid Properties Calculator
Properties of air, Ar, N2 and H2 calculated based on
correlations developed by F McQuillan. Properties of CO2, H2O(l) and the
ethylene glycols are based on the correlations
developed by Tom Lemczyk. The calculator takes the
temperature of the fluid as input and outputs an array of
properties at 1 atm.
-
Special Functions Calculator
Calculates special mathematical functions, including Gaussian error and
complementary error functions, gamma functions, and Bessel functions of
integer or fraction order
-
Spreading Resistance Calculator for Circular Sources on
Compound and Isotropic Disks
Calculates the thermal spreading resistance
for a circular source on an isotropic and two-layer circular disk,
semi-infinite circular cylinder, or half space.
-
Spreading Resistance Calculator for Isoflux Rectangles
and Strips on Compound Flux Channels
Calculates two- and three-dimensional thermal spreading resistance for
isoflux rectangular and strip sources on an isotropic and two-layer
rectangular disk, a semi-infinite rectangular cylinder, or half space.
Note: Although we have taken steps towards ensuring that the online
graphics images used in this site will be loaded everytime you submit a
request, sometimes you may notice that the image displayed on your screeen does
not match what you inputted (particularily if you have submitted many requests
on the same form). The best way to fix this problem is to clear your
browser's cache -- on Netscape, pull down the Options Menu, choose Network
Preferences, and click on Clear Memory Cache Now and Clear Disk Cache Now.
We are currently working on better ways to fix this problem, but this will
have to do for the time being.
Last updated August 27, 1998
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