Reynolds number calculation
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Dear friends, I would like to ask how the Reynolds number in the image is calculated. I’m not quite sure about it, and it seems that some data are missing. Please, those who know how to do this, could explain it in more detail.
Re=d*density*u/viscosity
Could we use an image as an example and plug in some numbers to do the calculation? I’m not quite sure how
Calculating? It gives me a headache just looking at it. There’s a problem with the choice of venturi; welded steel plates should be used instead.
I confirmed with them that this is a welding-type venturi tube
This post was last edited by einsamdog on 2017-9-12 21:32. Sorry, I misread the density earlier; the calculations in the data sheet are correct.
Could you explain it in detail? Thank you! Also, I mainly want to understand how to calculate the Reynolds number in order to resolve my doubts. My doubts seem to have been resolved now, but I still am not very sure how to calculate this Reynolds number
It’s explained in detail on https://zh.wikipedia.org/wiki/%E9%9B%B7%E8%AF%BA%E6%95%B0.
The Re number I calculated differs slightly from that in the table, but it’s basically the same; it can be used as a reference. 1. Flow rate: 8507 m^3/h 2. Inner diameter of pipe: 0.257 m 3. Cross-sectional area of pipe: 0.015874763 m^2 (0.25*π*D^2) 4. Air flow velocity inside the pipe: 45.553 m/s (Q/S) 5. Dynamic viscosity: 0.000013 6. Density: 0.771 7. Kinetic viscosity: 1.68612E-05 (dynamic viscosity/density) 8. Re: 694323.6415 (velocity*diameter/kinetic viscosity)
Could you tell me how to calculate it, or what tool is used for it?