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December 25, 2007, 07:36 |
Mass source term in Fluent 6.3
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#1 |
Guest
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There is a air duct with know velocity inlet and pressure outlet, I want to add a source of water vapor in the middle of the duct with known flow rate and temperature. How can I use the source term menu in Boundary Condition of the water vapor zone? Actually the main problem is that fluent does not get the composition of mass source.
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November 7, 2013, 07:29 |
Include humidity
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#2 |
Senior Member
sunil
Join Date: Jul 2012
Location: Bangalore
Posts: 179
Rep Power: 14 |
Hello sir,
How can we include relative humidity while defining material in fluent and also which multiphase model we have to use for humidity related calculation Thank you sir sunil M P |
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November 10, 2013, 12:58 |
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#3 |
Senior Member
A-A Azarafza
Join Date: Jan 2013
Posts: 226
Rep Power: 14 |
Hi, sunilpatil
You can include relative humidity in your problem by setting the calculated value for water mass fraction in B.C. Relative humidity is defined as: RH=Ph2o/P* From here, by having the value for RH, let say 0.5 for instance, you can now calculate Ph20 and therefore, obtain the mole fraction using: Ph2O=x. P in which, P is total pressure and x is mole fraction. Having the values for mole fraction, you can readily convert them into mass fraction: wi=xi.Mi/Mavg Mavg=sum (xi.Mi) where, wi is mass fraction of the species i and Mavg is average molecular weight of the involved species. I don't know what exactly is your problem, but you can even access the values for RH by getting a contour of it from: Graphic and animation\contours\species and from drop-down option, select "relative humidity". Hope it helps Good luck
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November 28, 2013, 09:24 |
Relative humidity
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#4 |
Senior Member
sunil
Join Date: Jul 2012
Location: Bangalore
Posts: 179
Rep Power: 14 |
Hello sir,
Thank you for your reply i want define mass fraction in fluent how to do this and also which multiphase model i have to use for these kind of problems. Thank you sir Sunil |
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