Temperature Contours / Isotherms

ujjwalmohanty · April 22, 2019, 13:19

Hi,
I am trying to simulate flow over heated triangular pipe in 2D in FLUENT.

My boundary conditions:

Top and bottom wall : Symmetry
Inlet : Temp : 300K, air velocity : ranging from 50 to 250 m/s based on Re.(I have taken viscosity and density of fluid as 1 for simplicity)
Cylinder (triangular pipe) : Temp:400K, no slip condition
Outlet : Pressure Outlet

Please check the attachment to see the temperature profile I am getting for transient run.
1. How do I get isotherms in the form of vortex shedding patterns?

LuckyTran · April 22, 2019, 14:34

What is the question exactly?

You have a plot of temperature contour, which is a plot of a bunch of isotherms.

And what do isotherms have to do with vortex shedding?

ujjwalmohanty · April 23, 2019, 15:31

Hi Lucky,

I am sorry if I was not clear with my question.
I plotted Temperature (static temperature) contours and got the image that I attached in my original question.
However I was expecting of the sort that I have attached with this comment.

I plotted the same contours in both the cases.
Why am I getting different contours?

LuckyTran · April 23, 2019, 17:59

Which picture is which? And where do you get them from?

The original picture looks like there is no flow (or too much viscosity). Probably because you set the viscosity to 1.

You can also compare the velocity fields, probably they'll look very different.

Just check your settings and make sure you use the right settings to get the right results.

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April 22, 2019, 14:34		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,674 Rep Power: 65	What is the question exactly? You have a plot of temperature contour, which is a plot of a bunch of isotherms. And what do isotherms have to do with vortex shedding?

April 23, 2019, 17:59		#4
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,674 Rep Power: 65	Which picture is which? And where do you get them from? The original picture looks like there is no flow (or too much viscosity). Probably because you set the viscosity to 1. You can also compare the velocity fields, probably they'll look very different. Just check your settings and make sure you use the right settings to get the right results.