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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 /965/CH4/EX4.9/9.sci | |
| parent | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff) | |
| download | Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.gz Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.bz2 Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.zip | |
initial commit / add all books
Diffstat (limited to '965/CH4/EX4.9/9.sci')
| -rw-r--r-- | 965/CH4/EX4.9/9.sci | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/965/CH4/EX4.9/9.sci b/965/CH4/EX4.9/9.sci new file mode 100644 index 000000000..c177318d8 --- /dev/null +++ b/965/CH4/EX4.9/9.sci @@ -0,0 +1,31 @@ +clc;
+clear all;
+disp("time for cooling")
+D=10/1000;//m Diameter of plastic sphere
+ti=75;// degree C
+t=35;// degree C
+ta=23;// degree C
+V=10;// m/s
+//for copper
+kcu=400;// W/m.K
+rhocu=8933;// kg/m^3
+ccu=380;// J/kg.C
+//for air at 23 degree C
+mu=18.16*10^(-6);// N.s/m^2
+v=15.36*10^(-6);//m^2/s
+ka=0.0258;// W/m.K
+Pr=0.709
+mus=19.78*10^(-6);// N.s/m^2 at 35 degree C
+
+Re=V*D/v
+l=Re^0.5;
+m=Re^(2/3);
+n=Pr^0.4;
+p=(mu/mus)^0.25;
+Nu=2+(0.4*l+0.06*m)*n*p
+h=ka*Nu/D;
+X=(t-ta)/(ti-ta);
+Y=-h*6/(rhocu*ccu*D);
+tau=(log (X))/Y;// sec
+disp("s",tau,"time taken to cool tau =")
+
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