Chemical Forums
Specialty Chemistry Forums => Chemical Engineering Forum => Topic started by: engchess on May 31, 2006, 06:55:57 AM
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hiiii everyone ... i wish u can help me in this .. i have a mass transport project and it is about couette flow .. in the cylinder i have two fluid water and oil .. my dr. ask me a aquetstion to look after it he says why the water rotates around the oil why not the oppisite he give me a hint he says it is to minimize the energy but he want the princibple that states that ? .. can u help me do u have any idea about what principle he is talking about !
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When water and oil separates - which one is at the bottom and why?
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when they are seperates i do not know , but he wants why when they are rotating in the cylinder the oil centerized the water
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Reason is the same, just forces different. Think it over.
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Compare their density. Which is "lighter"?
Where does the "lighter" component go?
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yeah i said the density thing ,but he said that beside this there is another reason about minimizing their energy and he wants the name of the principle that says so ..
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Hi engchess,
There is a part of Canada which produces oil which has a higher density than water (Oil density = 1.09, salt-water density = 1.01). In this case the oil would be at the bottom. I believe that almost all refined or natural oils have a density near or below 1.0.
If I said all oils have a density below 1.0, someone would know of a exception-to-the-rule.
;)
Best of luck,
Eugene