Error in Sudden and Gradual Contraction K Factor?

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NavierIsStoked
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Joined: Thu Jun 12, 2014 7:43 pm

Error in Sudden and Gradual Contraction K Factor?

Post by NavierIsStoked » Thu Jun 12, 2014 7:51 pm

I was looking at both the calculator and theory for calculating the K factor through elargements and contractions and think you might have an error.

It looks like you are referencing Crane, but I think you added a squared term.


For sudden contraction you have:

K1 = 0.5 * (1 - beta^2) ^2

The Crane reference has it as:

K1 = 0.5 * (1 - beta^2)


The squared term is only in the sudden enlargement term (which you have):

K1 = (1 - beta^2) ^2



Just something I found.

admin
Site Admin
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Re: Error in Sudden and Gradual Contraction K Factor?

Post by admin » Fri Jun 13, 2014 11:16 pm

Well spotted, thank you for correction!
I have just made change in calculator and theory page itself.
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