Reynolds nos verification

[gnikomson2000]

Could somebody confirm or negate these Reynolds numbers? The Object is a ethanol still, a twin outlet (Tee fitting) vapor conduit of variable diameters, fed from a boiler which generates the vapor. The vapor speeds are known and correct. I just need clarification of the Re nos relative to pipe diameters.

vapor%20speeds.JPG (41.89 KiB) Viewed 6984 times

Thanks in advance

[admin]

Do you know viscosity of fluid in given positions?

[gnikomson2000]

Do you know viscosity of fluid in given positions?

The fluid is ethanol-water vapor assumed to be azeotropic at all points. Azeotrope is 89 mole-% ethanol and 11 mole-% water, or roughly 96% & 4% by volume. Below is the chart I have for properties of the pure (100%) substances...

Ethanol-Water Properties.jpg (77.02 KiB) Viewed 6978 times

Many thanks for any input.

Regards Harry

[admin]

With these values for viscosity you can use equation for mixtures at:
http://www.pipeflowcalculations.com/pip ... cosity.htm

And with mixture viscosity, you can calculate Re number using:
http://www.pipeflowcalculations.com/reynolds/index.htm
above calculator.

[gnikomson2000]

Thank you for pointing me in the right direction

Regards Harry