Pro/Forums - View Single Post - "Nazca"

bobo5195 · 01-15-2006, 04:39 PM

Need a nice fat 90 hole for confined jet impingement to really work.

I remain sceptical on the channels back pressure. Classical theory says every 90 turn adds a back pressure of 0.5*rho*v^2. So a nice squiggly line could be painful. Classical theory is wrong in this case but still as a ball park number it does look nasty.

The shorter length of some channels worries me as well as flow would prefer these over the central longer channels. Possibly leading to recirculation of flows in the channels.

The nozzles wont work very well in those channels as they are too deep and letting the flow spread out more is generally a good idea. Jets hitting a plate at an angle is complicated but may improve heat transfer under certain conditions.

01-15-2006, 04:39 PM	#6
bobo5195 Cooling Savant Join Date: Aug 2005 Location: uk Posts: 400	Re: "Nazca" - Waterblock Concept Need a nice fat 90 hole for confined jet impingement to really work. I remain sceptical on the channels back pressure. Classical theory says every 90 turn adds a back pressure of 0.5rhov^2. So a nice squiggly line could be painful. Classical theory is wrong in this case but still as a ball park number it does look nasty. The shorter length of some channels worries me as well as flow would prefer these over the central longer channels. Possibly leading to recirculation of flows in the channels. The nozzles wont work very well in those channels as they are too deep and letting the flow spread out more is generally a good idea. Jets hitting a plate at an angle is complicated but may improve heat transfer under certain conditions.