CFD Online Discussion Forums (https://www.cfd-online.com/Forums/)
-   Main CFD Forum (https://www.cfd-online.com/Forums/main/)
-   -   Turbulence kinetic energy comparison (https://www.cfd-online.com/Forums/main/111281-turbulence-kinetic-energy-comparison.html)

 bjorson January 2, 2013 11:21

Turbulence kinetic energy comparison

Hello guys,

I need help with this problem:

I am designing solar collector for vacuum heat tube from metal foam, and I have two designs of manifolders. First has simple flow canal, second has curvature flow canal. Curvature should have influence to turbulence and vortexes. But is it really necessary make so "aerodynamic shape" of flow canal at low speed of flow? Fluid flow is only 2 litres per minute.

Simulation of turbulence kinetic energy is in this picture (2D, right side). Is it big difference in value of TKE?

Thanks

 FMDenaro January 2, 2013 12:06

Quote:
 Originally Posted by bjorson (Post 399767) Hello guys, I need help with this problem: I am designing solar collector for vacuum heat tube from metal foam, and I have two designs of manifolders. First has simple flow canal, second has curvature flow canal. Curvature should have influence to turbulence and vortexes. But is it really necessary make so "aerodynamic shape" of flow canal at low speed of flow? Fluid flow is only 2 litres per minute. Simulation of turbulence kinetic energy is in this picture (2D, right side). Is it big difference in value of TKE? 1. http://lzzz.sk/wp-content/uploads/2013/01/h_te_1.jpg 2. http://lzzz.sk/wp-content/uploads/2013/01/o_te.png Thanks

I don't think that you have such a low velocity and small lenght to have low Reynolds number, isn't right?

 bjorson January 3, 2013 03:53

Quote:
 Originally Posted by FMDenaro (Post 399778) I don't think that you have such a low velocity and small lenght to have low Reynolds number, isn't right?
Pictures are only cut from all situations, Rīnumber in my area of interest is 4000, I know it is up to 2300, but Is it difference between this two solutions to big?

 Maria3344 January 9, 2013 04:33

Kinetic Energy

Kinetic energy is an important constituent in the mechanical energy conversion and power generation. This link might help you in elaborating the issue.

http://us.docsity.com/en-docs/Mechan...of__Robert_Lin

 All times are GMT -4. The time now is 21:15.