flprops – the fluid properties calculator tom ames and mark cutler
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FLPROPS – THE FLUID PROPERTIES CALCULATOR
Tom Ames and Mark Cutler
Motivation
April 1st 2009
Heat Transfer problems often require extensive tabulated data
Iterative problems, especially, can be tedious
Current Solutions
April 1st 2009
Fluid properties are looked up and linearly interpolated by hand Very time consuming and prone to error
Jon Isaacson’s Thermophysical Properties Calculator is used GUI keeps the calculator from being
incorporated into other software packages Numbers must still be written out by hand.
FLPROPS
April 1st 2009
A MATLAB m-file that contains properties for the following fluids: Air, Ammonia, Carbon Dioxide, Carbon
Monoxide, Helium, Hydrogen, Nitrogen, Oxygen, Water Vapor, Engine Oil, Ethylene Glycol, Glycerin, R-132a, R-22, Mercury, and Water
Delivers any property needed Water quality also included
FLPROPS
April 1st 2009
Called as a function from an m-file You never even see the property value Allows for iterative solutions in seconds
Syntax [beta,Pr,nu,k]=flprops('air',Tf,'beta','Pr','nu',
'k'); Place the file in your working directory
and type “help flprops” into the command window
Future Work
Porting flprops scripts to other math programs Maple Mathematica Excel VBA
Making a stand alone program Use GUI like Isaacson’s Allow for command line prompt that can be
called from other programs
April 1st 2009
Questions?
April 1st 2009
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