September 8, 2022 at 2:07 pmDubey92Subscriber
I am using Solidifciation/Melting in FLUENT and I have temperature dependent properties for the material. I have properties for the pure solid and pure liquid separately which are temperature dependent. I want to know how to write the property for the mushy zone(between solidus and liquidus). I have read in research papers that the properties in the mushy zone are function of liquid fraction but when I am using the formula, I am facing convergence issues. Any help is much appreciated. Thanks.
September 8, 2022 at 2:24 pmRobAnsys Employee
How much do the values change, over what temperature range and how well resolved is the mesh?
September 9, 2022 at 4:11 amDubey92Subscriber
Rob, the values for the solid and the liquid both are different functions of temperature. The mushy zone varies over around 50-60 K. The mesh is very fine(1 micron).
September 9, 2022 at 8:23 amRobAnsys Employee
Can you plot the two sets of properties as they're added to Fluent (ie use the values from the Fluent panel) on one graph? I want to see the bit around and through the mushy zone.
September 9, 2022 at 1:05 pmDrAmineAnsys Employee
You are adjusting the material properties for Solid and the Liquid part. The Mushy properties will be derived from these properties.
September 9, 2022 at 4:03 pmDubey92Subscriber
@ DrAmine, So I have properties from room temperature till solidus point(start of melting) and then above liquidus point(complete liquid). Do I need to give properties in between solidus and liquidus or FLUENT can adjust itself?
September 12, 2022 at 6:44 amDrAmineAnsys Employee
Properties are required between liquidus and solidus so if you do not have these values that is okay as you need to provide piece-wise linear / polynomial values for all thermo-transport properties.
Which propertis do you have in mind?
September 12, 2022 at 11:00 amDubey92Subscriber
@DrAmine. Thermo-physical properties like thermal conductivity and specific heat. The issue is that I am giving these properties through UDF and not putting them in Fluent manually.
September 12, 2022 at 11:19 amDrAmineAnsys Employee
Should not be a problem. Fluent is intepreting the properties as porperties for single phase component so be careful there with providing the temperature dependency.
September 12, 2022 at 11:32 amDubey92Subscriber
Thanks a lot.
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