Gas conduction


To calculate the thermal conduction between two bodies, separated by a gap filled with gas
Follow the steps, and if you are
ready press the button calculate and evaluate the results in the graph.



Step 1 Input system size

T1 [K] Upper wall temperature

T2 [K] Lower wall temperature

a [m] Distance between the walls

P [Pa] Gas pressure

Step 2 Select Gas properties

Select Gas

Properties of Carbon dioxide
Mm 0.04401 [kg] Molar mass
gamma1.304 specific heat capacity ratio
alpha0.92 thermal accommodation factor (take 0.5 as a guess - higher for heavier molecules, and lower for lighter)
Tmin185[K]Minimum temperature for this gas.
Tmax1670[K]Maximum temperature for this gas.
aa-0.007215--
bb0.00008015--
cc5.477e-9--
dd-1.053e-11--
Gasconduction at 1 atmosphere and average T =293.50[K]: λ = aa+bb*T+cc*T2+dd*T3= 0.016515[W/m K]

Step 3 Calculate

Heat transfer coefficient at gap=0.001mCarbon dioxidep=30[Pa]0E02E13E14E15E16E15E06E07E08E09E01E12E13E1Pressure [Pa]Hg [W/m2 K]
XCarbon dioxidep=30[Pa]
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3011.056
Heat transfer coefficient at P=30 Pa5E06E07E08E09E01E12E13E1Hg [W/m2 K]
XCarbon dioxidea=0.001[m]
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0.00111.056

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This calculator was made for educational purposes only. No rights can be obtained from the results you calculate. If you have comments please contact info@dspe.nl.


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