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July 31, 2002, 00:44 |
Volume fraction to mass fraction
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#1 |
Guest
Posts: n/a
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hi, all friend I have the value of volume fraction in my result and i want to change the volume fraction to mass fraction or concentration. How i do?
Torsaki |
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July 31, 2002, 11:37 |
Re: Volume fraction to mass fraction
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#2 |
Guest
Posts: n/a
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Hi Torsaki,
Look to the units for the answer... To get the mass fraction, multiply by the density ratio of the two materials: ((m^3)_1/(m^3)_2)*(kg/m^3)_1/(kg/m^3)_2=(kg_1/kg_2) You can use a similar method to convert to concentration. Robin |
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August 6, 2002, 01:36 |
Re: Volume fraction to mass fraction
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#3 |
Guest
Posts: n/a
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Hi all,
If i have volume fraction and i want to cover to concentrition how can i do?Thanknew user |
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August 13, 2002, 17:01 |
Solution Method in CFX 5.5.1
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#4 |
Guest
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hi any one,
I want to know as soon as possible what the Alogarethim solution method use in the CFX 5.5.1 is it SIMPLE method or another method? |
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August 14, 2002, 09:56 |
Re: Solution Method in CFX 5.5.1
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#5 |
Guest
Posts: n/a
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Hi Hamza,
Simply put, CFX-5 uses a coupled multigrid approach whereby the hydrodynamic equations (u,v,w,p) are solved simultaneously in a single matrix at each timestep. For a more thorough explanation, see http://www.cfd-online.com/Forum/cfx_...e.cgi?read=934, or contact CFX. Regards, Robin |
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December 25, 2010, 01:35 |
mass fraction to (%vol/vol)
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#6 |
New Member
Mahwish
Join Date: Oct 2009
Posts: 7
Rep Power: 17 |
HI all
I am totally lost in the conversion .I need to convert mass fraction to (vol/vol)%. I ahve two gases 0.316 of FReon and 0.684 of Nitrogen. |
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December 25, 2010, 05:12 |
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#7 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,854
Rep Power: 144 |
You use the gas densities to convert mass fraction to volume fraction, as described above.
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August 19, 2011, 12:23 |
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#8 |
New Member
Mitch Olson
Join Date: Aug 2011
Posts: 1
Rep Power: 0 |
It looks like I was having the same problem to convert from mass fraction to volume fraction. Here is the formula:
vf1=1/(1+(rho1/rho2)*(1/wf1-1)) vf2=1/(1+(rho2/rho1)*(1/wf2-1)) where, vf1=phase 1 volume fraction vf2=phase 2 volume fraction wf1=phase 1 mass fraction wf2=phase 2 mass fraction rho1=phase 1 density rho2=phase 2 density PS. To double check you correctly entered the formula check that vf1 + vf2 = 1 |
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August 21, 2011, 01:40 |
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#9 |
New Member
Mahwish
Join Date: Oct 2009
Posts: 7
Rep Power: 17 |
Thanks a lot for your answere . I apreciate it
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February 21, 2015, 11:46 |
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#10 |
New Member
Join Date: Jul 2013
Posts: 16
Rep Power: 13 |
I tank U too, deer Olsan
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March 10, 2018, 04:41 |
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#11 |
New Member
Adhavan K
Join Date: Mar 2018
Posts: 3
Rep Power: 8 |
Could anyone please explain the formula mathematically. I am getting value more than one when added the mass fractions.
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