- **Main CFD Forum**
(*http://www.cfd-online.com/Forums/main/*)

- - **Diffusion Coefficients
**
(*http://www.cfd-online.com/Forums/main/1589-diffusion-coefficients.html*)

Diffusion Coefficients
Hello Everyone:
I am working on a problem which involves pure mixing without anyone reaction. The fluids used are ethylene glycol and water. Can you anyone help me in estimating the value of the diffusion coefficient bewteen these two fluids? Thanks, Thomas |

Re: Diffusion Coefficients
yes...it's quite obvious when you think about it.
it's roughy 0.789. I worked it out.... |

Re: Diffusion Coefficients
Hi Nigel,
Can you please me know the procedure and formulas used to arrive at this value? Thanks, Thomas |

Re: Diffusion Coefficients
Dear Thomas
I do not have exact data but diffusion coefficients of solute in the water(solvent) is order of 10^(-5) sq.cm/sec. If your problrm is turbulent flow(usual case), approximate value might be O.K. because turbulent diffusion is predominat, maybe as large as 'order of 10^2 ~ 10^3' than molecular diffusion. Sincerely, Jinwook |

All times are GMT -4. The time now is 05:03. |