viscosity of mixtures

August 2, 1999, 05:55

I'm programming a CFD-code for simulating the mixture of two miscible fluids, namely glycerine and water. The pure fluids have quite different kinematic viscosities, so what's the viscosity of the mixture depending on the concentrations?

Thanks, Karsten

August 3, 1999, 05:21

Karsten,

First of all, check literature. Try for instance the book "Glycerol" from A.A. Newman, published in 1968. Lots of properties are given as function of water concentration. Very useful.

I have done calculations with CFX 4.2 on mixtures of glycerin and water. Glycerin was the continuous phase in which water was represented as a scalar. Viscosity, heat capacity and other properties depended on the scalar concentration. I used User-fortran routines. Interested? Just send an e-mail

Gert-Jan van der Gulik

August 12, 1999, 07:13

If the flow is turbulent, you do not need an accurate viscosity.

Kind regards

X. Ye

August 2, 1999, 05:55	viscosity of mixtures	#1
Karsten Koetter Guest Posts: n/a	I'm programming a CFD-code for simulating the mixture of two miscible fluids, namely glycerine and water. The pure fluids have quite different kinematic viscosities, so what's the viscosity of the mixture depending on the concentrations? Thanks, Karsten

August 3, 1999, 05:21	Re: viscosity of mixtures	#2
Gert-Jan van der Gulik Guest Posts: n/a	Karsten, First of all, check literature. Try for instance the book "Glycerol" from A.A. Newman, published in 1968. Lots of properties are given as function of water concentration. Very useful. I have done calculations with CFX 4.2 on mixtures of glycerin and water. Glycerin was the continuous phase in which water was represented as a scalar. Viscosity, heat capacity and other properties depended on the scalar concentration. I used User-fortran routines. Interested? Just send an e-mail Gert-Jan van der Gulik

August 12, 1999, 07:13	Re: viscosity of mixtures	#3
X. Ye Guest Posts: n/a	If the flow is turbulent, you do not need an accurate viscosity. Kind regards X. Ye

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