How to estimate characteristic length in a (rectangular) microchannel?

22 June 2015 1 4K Report

How can I calculate the characteristic length dimension for a microfluidic device with rectangular channel? If I don't have a straight rectangular channel, how do I calculate the characteristic length, for example a non-uniform curved channel?

Jean-Francois Antoine

Do you refer to Reynolds number calculation, where a characteristic dimension is needed ?

Usually this characteristic "length" is a the hydraulic diameter (for non cylindrical channel).

Some further informations in the document ?

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