Sanity Check on unit consistency for Steady State Thermal Analysis
Sanity Check on unit consistency for Steady State Thermal Analysis
(OP)
I have a good many years of working with Abaqus but mostly with structural, quasi-static analysis etc but not much thermal. Right now I have a more or less simple thermal model that I am trying to correlate to measured performance and I fear my unit consistency may not be correct for some of the more unusual properties.
I work in metric: (mm, N, tonne, sec, MPa) which gives mW, mJ etc for thermal.
Does the following look correct?
Length mm
Force N
Mass tonne (10^3kg)
Time s
Stress MPa
Energy mJ
Density tonne/mm^3
acceleration mm/s^2
Power mW
conductivity mW/(mm*K)
specific heat mJ/tonne*K
convection mW/(mm^2*K)
film coefficent mW/(mm^2*K)
for my inputs for something like stainless steel I get:
conductivity of 20
density of 8E-009
elastic 200000
Expansion 2.2E-005
Specific Heat of 4.5E8
film factor (natural convection heat transfer) around 0.0015
Thanks
Luke
I work in metric: (mm, N, tonne, sec, MPa) which gives mW, mJ etc for thermal.
Does the following look correct?
Length mm
Force N
Mass tonne (10^3kg)
Time s
Stress MPa
Energy mJ
Density tonne/mm^3
acceleration mm/s^2
Power mW
conductivity mW/(mm*K)
specific heat mJ/tonne*K
convection mW/(mm^2*K)
film coefficent mW/(mm^2*K)
for my inputs for something like stainless steel I get:
conductivity of 20
density of 8E-009
elastic 200000
Expansion 2.2E-005
Specific Heat of 4.5E8
film factor (natural convection heat transfer) around 0.0015
Thanks
Luke





RE: Sanity Check on unit consistency for Steady State Thermal Analysis
Your convection coefficient seems low. 7.5 W/m^2-K is probably more realistic in air, and partially accounts for radiative loss as well.
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RE: Sanity Check on unit consistency for Steady State Thermal Analysis
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