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#1 |
New Member
Join Date: Oct 2017
Posts: 1
Rep Power: 0 ![]() |
Hi all,
I'm new to the world of CFD and STAR CMM+. I have a hollow pipe with steady flow,defined inlet velocity of 0.1 m/s and pressure outlet, segregated flow. This is my parameters: d =6mm l =300mm density= 1050 kg/m^3 viscosity= 3.5 mPas I would like to determine the entrance length for this pipe. I have already determine it theoretically as 64.8 mm. How can I determine this using a field function? Can I show the exact point where the flow becomes fully developed graphically? Any advice and/or suggestions are welcome. ![]() ![]() |
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#2 |
Senior Member
Matt
Join Date: Aug 2014
Posts: 947
Rep Power: 18 ![]() |
You could create a field function to return du/dx at constant radius (assuming u is velocity and x is aligned with the pipe axis). Then you would want to look for a location where that gradient is zero (or reasonably close). You could maybe setup an XY plot and show x vs du/dx for a handful of radial locations and show where they all reach zero.
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Tags |
developing flow, entrance length, field function, new forum, star ccm+ |
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