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jim November 28, 2003 13:38

molar mass
 
Hi, All

In tutorial 13 of CFX 5.6, the molar mass of acid(H2SO4) is set to be 19.52 kg/kmol. How to get this value? Can anyone help to list the details of deriving Molar mass from molecular weight?

Thanks!


jim November 28, 2003 13:49

Re: molar mass
 
Aslo: How can I get the kinematic diffusity of a chemical? From literature? or by experiment?


Pascale Fonteijn December 1, 2003 10:03

Re: molar mass
 
This looks like an average molar mass of a aqueous solution of H2SO4. Pure H2SO4 = 2*1+1*32+4*16 ~98 kg/kmol.

Pascale

Pascale Fonteijn December 1, 2003 10:04

Re: molar mass
 
Yes, from literature, Perry or something. However if conditions are turbulent, then fill in 1e-10 or so.

Pascale

jim December 1, 2003 12:55

Re: molar mass
 
Hi,Pascale,

Thanks for your reply. As you said, if conditions are turbulent, then fill in 1e-10 or so---Does this mean the kinematic diffusity will be material independent for turbulent flow? Are you sure of this?

By the way, could you please list some literatures about kinematic diffusity?

Thanks a lot!

Pascale Fonteijn December 2, 2003 05:14

Re: molar mass
 
Yes, I am sure.

'Properties of gases and liquids' from Reid is a good start.

Pascale

jim December 2, 2003 11:55

Re: molar mass
 
Thanks a lot for your information!

Best regards!

jim December 3, 2003 11:31

Re: molar mass
 
Hi, Pascale,

As you said, the kinematic diffusity will be material independent for turbulent flow. Could you please provide the literature sources for such a conclusion? I am trying to use this conclusion in my thesis work, but I do need to put a reference for that.

Thanks again!

Jim

Pascale December 4, 2003 09:34

Re: molar mass
 
pfffff..

Try the cfx-manual as a start. And further... Bird, Stewart and Lightfoot?

Pascale

jim December 4, 2003 12:40

Re: molar mass
 
Thnaks!


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