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Diffstat (limited to '965/CH9/EX9.7')
| -rw-r--r-- | 965/CH9/EX9.7/7.sci | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/965/CH9/EX9.7/7.sci b/965/CH9/EX9.7/7.sci new file mode 100644 index 000000000..3a6fc3bc1 --- /dev/null +++ b/965/CH9/EX9.7/7.sci @@ -0,0 +1,15 @@ +clc;
+clear all;
+disp("different types of processes for condensation of capours on a solid surface")
+disp("there are two types of methods for condensation")
+disp("filmwise - in which condensation wets the surface forming a continuous film whic corners the entire surface")
+disp("dropwise - in which vapour condenses into small droplets of various sizes which fall down the surface in a random fashion")
+disp("filmwise - generally occurs on clean uncontaminated surfaces.")
+disp("in this type of condensation the film covering the entire surface grows in thickness as it moves down the surface by gravity.")
+disp("There exists a thermal gradient in the film and so it acts as a resistance to heat transfer")
+disp("Although a dropwise condensation would be preferred to filmwise condensation yet it is extremely difficult to achieve and maintain")
+disp("This is because most surface become wetted after being exposed to condensing vapours over a period of time. ")
+disp("Dropwise condensation can be obtained under controlled conditions with the help of certain additives to the condensate and various surface coatings,")
+disp("But its commercial viability has not yet been proved")
+disp("For this reason the condensaing equipments in use are designed on the basis of filmwise condensation.")
+
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