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| author | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
|---|---|---|
| committer | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
| commit | 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 (patch) | |
| tree | dbb9e3ddb5fc829e7c5c7e6be99b2c4ba356132c /534/CH14/EX14.1/14_1_Diffusion_mass_transfer_Hydrogen.sce | |
| parent | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff) | |
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Diffstat (limited to '534/CH14/EX14.1/14_1_Diffusion_mass_transfer_Hydrogen.sce')
| -rw-r--r-- | 534/CH14/EX14.1/14_1_Diffusion_mass_transfer_Hydrogen.sce | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/534/CH14/EX14.1/14_1_Diffusion_mass_transfer_Hydrogen.sce b/534/CH14/EX14.1/14_1_Diffusion_mass_transfer_Hydrogen.sce new file mode 100644 index 000000000..00496de66 --- /dev/null +++ b/534/CH14/EX14.1/14_1_Diffusion_mass_transfer_Hydrogen.sce @@ -0,0 +1,44 @@ +clear;
+clc;
+printf('FUNDAMENTALS OF HEAT AND MASS TRANSFER \n Incropera / Dewitt / Bergman / Lavine \n EXAMPLE 14.1 Page 884 \n')// Example 14.1
+
+// Molar and mass fluxes of hydrogen and the relative values of the mass and thermal diffusivities for the three cases
+
+T = 293 ;//[K] Temperature
+Ma = 2 ;//[kg/kmol] Molecular Mass
+//Table A.8 Hydrogen-Air Properties at 298 K
+Dab1 = .41*10^-4; //[m^2/s] diffusion coefficient
+//Table A.8 Hydrogen-Water Properties at 298 K
+Dab2 = .63*10^-8; //[m^2/s] diffusion coefficient
+//Table A.8 Hydrogen-iron Properties at 293 K
+Dab3 = .26*10^-12; //[m^2/s] diffusion coefficient
+//Table A.4 Air properties at 293 K
+a1 = 21.6*10^-6; //[m^2/s] Thermal Diffusivity
+//Table A.6 Water properties at 293 K
+k = .603 ;//[W/m.K] conductivity
+rho = 998 ;//[kg/m^3] Density
+cp = 4182 ;//[J/kg] specific Heat
+//Table A.1 Iron Properties at 300 K
+a3 = 23.1 * 10^-6; //[m^2/s]
+
+//Equation 14.14
+//Hydrogen-air Mixture
+DabT1 = Dab1*(T/298)^1.5; // [m^2/s] mass diffusivity
+J1 = -DabT1*1; //[kmol/s.m^2] Total molar concentration
+j1 = Ma*J1; //[kg/s.m^2] mass Flux of Hydrogen
+Le1 = a1/DabT1; // Lewis Number Equation 6.50
+
+//Hydrogen-water Mixture
+DabT2 = Dab2*(T/298)^1.5; // [m^2/s] mass diffusivity
+a2 = k/(rho*cp) ;//[m^2/s] thermal diffusivity
+J2 = -DabT2*1 ;//[kmol/s.m^2] Total molar concentration
+j2 = Ma*J2 ;//[kg/s.m^2] mass Flux of Hydrogen
+Le2 = a2/DabT2 ;// Lewis Number Equation 6.50
+
+//Hydrogen-iron Mixture
+DabT3 = Dab3*(T/298)^1.5; // [m^2/s] mass diffusivity
+J3 = -DabT3*1; //[kmol/s.m^2] Total molar concentration
+j3 = Ma*J3; //[kg/s.m^2] mass Flux of Hydrogen
+Le3 = a3/DabT3 ;// Lewis Number Equation 6.50
+
+printf('\n Species a (m^2/s) Dab (m^2/s) Le ja (kg/s.m^2) \n Air %.1e %.1e %.2f %.1e \n Water %.1e %.1e %i %.1e \n Iron %.1e %.1e %.1e %.1e',a1,DabT1,Le1,j1,a2,DabT2,Le2,j2,a3,DabT3,Le3,j3);
\ No newline at end of file |