Learning Forum

[sevgia]

[sevgia]

It looks like solid is always 26 C degree but fluid gets colder. I need to see the thermal change on solid. I'm also adding how I define the temperature values in next screenshot.

[Rob]

Because you changed the wall between the fluid and solid to a temperature from coupled the wall will always be 26.85C. You need to use coupled and patch the solid temperature into the system.

[sevgia]

This time, I follow this steps. It it what you recommend? Thank you

[sevgia]

I finished analysis. But the problem is, places where water is not filled looks like 90 C ( 363 K). How can I fix it?

[Rob]

How long did you run the model for?

[sevgia]

It was around 300 number of steps with 0.001 step size

[Rob]

OK, so you've modelled 0.3s of hot water hitting the mug. Replot the temperature contour just on the mug using the local temperature.

[sevgia]

Thanks a lot. It worked when I change global to local. But at the start of the simulation I see some different colors inside solid.
What could be leading this? Is there a way to fix this look? When I run the simulation more, it looks normal like this;

[Rob]

Look at the scale in the first image - you're picking up noise so altering the scale to 298.0 - 298.2 should fix it. The second image is more normal as you have a 10K temperature range.

[sevgia]

When I choose local option, scale changes automaticly depending on the time. When I choose global, I can't see temperature change of solid glass. Is there a way of arranging this?

[Rob]

There should be a manual or user defined range. I tend to post process in Fluent so am not entirely sure what the option is called.

[sevgia]

Thank you