From b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b Mon Sep 17 00:00:00 2001 From: priyanka Date: Wed, 24 Jun 2015 15:03:17 +0530 Subject: initial commit / add all books --- 581/CH11/EX11.16/Example11_16.sce | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100755 581/CH11/EX11.16/Example11_16.sce (limited to '581/CH11/EX11.16/Example11_16.sce') diff --git a/581/CH11/EX11.16/Example11_16.sce b/581/CH11/EX11.16/Example11_16.sce new file mode 100755 index 000000000..22a7271df --- /dev/null +++ b/581/CH11/EX11.16/Example11_16.sce @@ -0,0 +1,30 @@ + +clear; +clc; + +printf("\t Example 11.16\n"); +T1=298; //temp.of air,K +T2=323.15; //film temp.,K +x=0.05; //mass fraction of water at 75 C +Gm=0.017; //average mass transfer coefficient,kg/(m^2*s) +A=0.04; //suraface area of pan,m^2 +l=0.2; //length of pan in flow direction,m +v=5; //air speed,m/s +m=(x+0.277)/2; //film composition of water at 50 C +Mf=26.34; //mixture molecular weight,kg/kmol +af=101325*Mf/(8314.5*T2); //film density from ideal gas law,kg/m^3 +Uf=1.75*10^-5; //film viscosity,kg/(m*s) +Vf=Uf/af; //kinematic viscosity,m^2/s +Rel=v*l/Vf; //reynolds no. comes out to be 56,800 so the flow is laminar. +B=0.314; //mass transfer driving force + +D=2.96*10^-5; //diffusivity of water in air,m^2/s +Sc=Vf/D; //scimidt no. + +Nu=0.664*Rel^0.5*Sc^1/3; //nussselt no. +Gmw1=Nu*(D*A/l); //appropriate value of mass transfer gas phase coeffficient of water in air,kg/(m^2*s) +Gmw=Gmw1*(log(1+B)/B)+0.0168; //mass transfer gas phase coeffficient of water in air,kg/(m^2*s) + +printf("mass transfer gas phase coeffficient of water in air is : %.4f kg/(m^2*s)\n In this caes, the blowing factor is 0.870. thus the mild blowing has reduced the mass transfer coefficient by about 13 percent.",Gmw); + +//end \ No newline at end of file -- cgit