# 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 Carbon dioxideOxygenNitrogenHydrogenNeonHeliumArgonAir

 Mm 0.04401 [kg] Molar mass gamma 1.304 specific heat capacity ratio alpha 0.92 thermal accommodation factor (take 0.5 as a guess - higher for heavier molecules, and lower for lighter) Tmin 185[K] Minimum temperature for this gas. Tmax 1670[K] Maximum temperature for this gas. aa -0.007215 -- bb 0.00008015 -- cc 5.477e-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

XCarbon dioxidep=30[Pa]
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
3011.056
XCarbon dioxidea=0.001[m]
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
0.00111.056

-