velocity = parabolic + buoyant profiles

To calculate for other conditions, download Excel Spreadsheet
840 Press (mb)              
-15 Temp warm wall (°C)              
-30 Temp cold wall (°C)              
1.12 Wall separation (cm)              
10 Total flow (vLPM)              
                 
0.56 half wall separation (cm)       0.7435 Gamma = Pgd^2/(12RT^2µ)    
31.84 Cross section area (cm^2)       980.6 acceleration of gravity    
0.001168 Average dry air density (g/cm^3)       2.87E+06 gas constant for dry air    
5.23 Average velocity (cm/s)       273.16 deg C to deg K    
-15.00 wall temp difference (Tc - Tw)              
250.66 Average temp K              
Distance from cold wall (cm) Z = distance from center temp(°C) dynamic viscosity parabolic (Z/d)^3 - Z/d) buoyancy sum Fractional distance from cold wall
0.00 -0.56 -30.00 1.568E-04 0.00 0.000 0.00 0.00 0.00
0.06 -0.50 -29.25 1.572E-04 -1.49 0.171 -1.95 -3.44 0.05
0.11 -0.45 -28.50 1.576E-04 -2.83 0.288 -3.27 -6.10 0.10
0.17 -0.39 -27.75 1.579E-04 -4.00 0.357 -4.05 -8.05 0.15
0.22 -0.34 -27.00 1.583E-04 -5.02 0.384 -4.34 -9.37 0.20
0.28 -0.28 -26.25 1.587E-04 -5.89 0.375 -4.23 -10.12 0.25
0.34 -0.22 -25.50 1.591E-04 -6.60 0.336 -3.78 -10.38 0.30
0.39 -0.17 -24.75 1.594E-04 -7.14 0.273 -3.07 -10.21 0.35
0.45 -0.11 -24.00 1.598E-04 -7.54 0.192 -2.15 -9.69 0.40
0.50 -0.06 -23.25 1.602E-04 -7.77 0.099 -1.11 -8.88 0.45
0.56 0.00 -22.50 1.606E-04 -7.85 0.000 0.00 -7.85 0.50
0.62 0.06 -21.75 1.609E-04 -7.77 -0.099 1.10 -6.67 0.55
0.67 0.11 -21.00 1.613E-04 -7.54 -0.192 2.13 -5.41 0.60
0.73 0.17 -20.25 1.617E-04 -7.14 -0.273 3.02 -4.12 0.65
0.78 0.22 -19.50 1.621E-04 -6.60 -0.336 3.71 -2.88 0.70
0.84 0.28 -18.75 1.624E-04 -5.89 -0.375 4.13 -1.75 0.75
0.90 0.34 -18.00 1.628E-04 -5.02 -0.384 4.22 -0.80 0.80
0.95 0.39 -17.25 1.632E-04 -4.00 -0.357 3.92 -0.09 0.85
1.01 0.45 -16.50 1.636E-04 -2.83 -0.288 3.15 0.33 0.90
1.06 0.50 -15.75 1.639E-04 -1.49 -0.171 1.87 0.38 0.95
1.12 0.56 -15.00 1.643E-04 0.00 0.000 0.00 0.00 1.00

Chart CFD temperature and velocity profiles


Last Updated on 10/29/1999
By Dave Rogers