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upflow .vs. downflow mixing

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Old   December 9, 1999, 03:50
Default upflow .vs. downflow mixing
  #1
leejh
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hi,

I want to know the flow pattern in mixing vessel

case 1. upflow mixing that is, input is located in bottom and

output is in top

case 2 downflow mixing : opposite case

if retention time in vessel is so fast ( about 1~2min ) and L/D =2.0 then what type( upflow & downflow ) is effective for well mixing ? is there any data about the flow pattern in both case ?

i hope your answer..

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Old   December 10, 1999, 05:08
Default Re: upflow .vs. downflow mixing
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Jin Wook LEE
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Dear Mr. Lee

I think that it depends on many factor such as the location of mixer(stirrer), inlet shape and so on. What I can say is, in general, gravity can not affect the flow pattern. If you have further question, please call me(02-3661-6411)

Sincerely, Jinwook
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