Defining Cp for air

nived · March 27, 2018, 04:14

How to define Cp of air by piecewise polynomial calculation?
What should be the values of coefficients?

Kummi · March 27, 2018, 09:22

Hi,
http://www.afs.enea.it/fluent/Public.../PDF/chp07.pdf

nived · March 27, 2018, 10:24

Thanks for the reply....
Iam doing an incompressible natural convection problem ....the density is calculated for ideal gas...so what should be the operating pressure??

patilyogesh · March 27, 2018, 10:51

as it is the case of natural convection, operating pressure is always atmospheric

nived · March 27, 2018, 10:54

In my reference paper it is said that "density was calculated for ideal gas". If i give density according to ideal gas, wht should be the operating pressure...
Thnks for replying....

Kummi · March 27, 2018, 10:58

For incompressible ideal gas problem, density is calculated by operating pressure =101325Pa (Atmospheric pressure in your case)

https://www.sharcnet.ca/Software/Flu...ug/node332.htm

patilyogesh · March 27, 2018, 10:59

atmospheric presssure

March 27, 2018, 04:14	Defining Cp for air	#1
nived New Member Nived Sankar Join Date: Mar 2018 Posts: 27 Rep Power: 8	How to define Cp of air by piecewise polynomial calculation? What should be the values of coefficients?

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March 27, 2018, 09:22		#2
Kummi Senior Member Kumaresh Join Date: Oct 2016 Posts: 348 Rep Power: 11	Hi, http://www.afs.enea.it/fluent/Public.../PDF/chp07.pdf

March 27, 2018, 10:24		#3
nived New Member Nived Sankar Join Date: Mar 2018 Posts: 27 Rep Power: 8	Thanks for the reply.... Iam doing an incompressible natural convection problem ....the density is calculated for ideal gas...so what should be the operating pressure??

March 27, 2018, 10:51		#4
patilyogesh New Member PATIL YOGESH KASHINATH Join Date: Mar 2018 Posts: 8 Rep Power: 8	as it is the case of natural convection, operating pressure is always atmospheric

March 27, 2018, 10:54		#5
nived New Member Nived Sankar Join Date: Mar 2018 Posts: 27 Rep Power: 8	In my reference paper it is said that "density was calculated for ideal gas". If i give density according to ideal gas, wht should be the operating pressure... Thnks for replying....

March 27, 2018, 10:58		#6
Kummi Senior Member Kumaresh Join Date: Oct 2016 Posts: 348 Rep Power: 11	For incompressible ideal gas problem, density is calculated by operating pressure =101325Pa (Atmospheric pressure in your case) https://www.sharcnet.ca/Software/Flu...ug/node332.htm

March 27, 2018, 10:59		#7
patilyogesh New Member PATIL YOGESH KASHINATH Join Date: Mar 2018 Posts: 8 Rep Power: 8	atmospheric presssure