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Chemical engineering: Can Bernaulli's theorem be applied on gases or not? Why?

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Question added by Maya Salameh , Senior Accountant , Royal Jordanian Airlines
Date Posted: 2017/08/23
Mohammad Zubair Imran
by Mohammad Zubair Imran , Contract analyst , Bureau Veritas

Bernaulli equation is valid for incompressible fluids, however a modified form of teh same may be used for gases incorporating the compressibility factor

MD JAVED AKHTAR
by MD JAVED AKHTAR , Site Manager , Nabatat Contracting Company

Generally NO but in one condition.

It is applicable only for Incompressible fluid, but for gasses, it can only be applied if the system is isolated from surrounding i.e if there will be no heat or KE/PE transferred to or from the system.

Mahesh Thota
by Mahesh Thota , Principal Mechanical Engineer , Worley (formerly Jacobs Zate)

Yes, Bernouli's Theorm is appliable for all gas mediums. These control the equilibrium of Pressure, volume and temperature carried by the fluid at every section of the pipe and equipment in steady transient state.

Aneesh Shandilya
by Aneesh Shandilya , Manager/ Lead Electrical , Orpic

 

Yes it can be used. Bernoullis equation is based on First law of thermodynamics and yes it can be used for gases. Measuring flow through orifice or ventury meters depends on this equation and is widely used in industry for gas flow measurement.

However using equation care has to be taken for assumption that fluid is incompressible, inviscous, and has a constant density throughout its motion.

Thabet Almezwk
by Thabet Almezwk , QC/QA Engineer , Alfanar Electrical system

Thanks for invitiation and sorry for mo answer where i don't have full aware about subject

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