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bobo5195 · 03-10-2006, 06:01 AM

Avoid turbulators(increases back pressure significantly). Turbulence will just fade away after the turbulator.

LHG turbulent mixing is indeed desirable but i'm not sure it is desirable enough to add turbulators, especially as the pipe is relatively thin. Heat wil move to the center of the tube by conduction. Will check the maths. I'm guessing after 10diameters = 7.5 inches (amount of time a thermal gradient needs to develop in the pipe) the extra heat transfer from the turbulators will be around 5% in other words neearly worthless compared to the added friction

03-10-2006, 06:01 AM	#37
bobo5195 Cooling Savant Join Date: Aug 2005 Location: uk Posts: 400	Re: passive radiator design help needed Avoid turbulators(increases back pressure significantly). Turbulence will just fade away after the turbulator. LHG turbulent mixing is indeed desirable but i'm not sure it is desirable enough to add turbulators, especially as the pipe is relatively thin. Heat wil move to the center of the tube by conduction. Will check the maths. I'm guessing after 10diameters = 7.5 inches (amount of time a thermal gradient needs to develop in the pipe) the extra heat transfer from the turbulators will be around 5% in other words neearly worthless compared to the added friction