effective Properties in mixture Model

sunboynavid · March 8, 2013, 03:33

hi all.....
We are starting to study nanofluids using two-phase mixture model. In Exerting This Model in Fluent , We have a problem and we hope you can help us about our Problem.
Our Problem is applying Effective Properties such as Conductivity , Viscosity or maybe Density in Fluent Software. You know that Fluent Default let Effective Properties in X-effective=φ*X2+(1-φ)*X1 and X1 ,X2 is Properties For Primary And Secondry phases. We want to let For example Effective Viscosity like μeffe=μf/(1-φ)0.25 in fluent. We think maybe we can solve this problem with writing a UDF for fluent ,but we don’t know where we have to exert in software.
Please Help us.

mettler · March 12, 2013, 12:45

If I remember correctly, when we did our nanofluid research we were able to define all properties in terms of temperature and let Fluent do the rest. I will have to double check on that, since we did this back in 2007/2008. Of course, this required us to measure the viscosity/conductivity at different temperatures in order to produce an equation.

saurabhg2014 · February 24, 2015, 03:43

Quote:

Originally Posted by mettler

If I remember correctly, when we did our nanofluid research we were able to define all properties in terms of temperature and let Fluent do the rest. I will have to double check on that, since we did this back in 2007/2008. Of course, this required us to measure the viscosity/conductivity at different temperatures in order to produce an equation.

You found anything

March 8, 2013, 03:33	effective Properties in mixture Model	#1
sunboynavid New Member navid hgh Join Date: Mar 2013 Posts: 1 Rep Power: 0	hi all..... We are starting to study nanofluids using two-phase mixture model. In Exerting This Model in Fluent , We have a problem and we hope you can help us about our Problem. Our Problem is applying Effective Properties such as Conductivity , Viscosity or maybe Density in Fluent Software. You know that Fluent Default let Effective Properties in X-effective=φX2+(1-φ)X1 and X1 ,X2 is Properties For Primary And Secondry phases. We want to let For example Effective Viscosity like μeffe=μf/(1-φ)0.25 in fluent. We think maybe we can solve this problem with writing a UDF for fluent ,but we don’t know where we have to exert in software. Please Help us.

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March 12, 2013, 12:45		#2
mettler Senior Member Andrew Join Date: Mar 2009 Location: Washington, DC Posts: 209 Rep Power: 18	If I remember correctly, when we did our nanofluid research we were able to define all properties in terms of temperature and let Fluent do the rest. I will have to double check on that, since we did this back in 2007/2008. Of course, this required us to measure the viscosity/conductivity at different temperatures in order to produce an equation.