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Les · 02-21-2004, 06:16 AM

In fact/fantasy the DeltaT(metal -water) of ~ 50c(K) is close to my guess for a 250w load, using* h~ 10kw/m*m*K over all the dashpots' surface areas.

* v~ 0.25m/s, d~ 1mm using Flomerics rather than Sieder-Tate(ish) calculations.

Edit
h ~ 23kw/m*m*k for the nozzle velocity (v) of 1m/s.
This would reduce my guess Delta T from 67.5c to 39.75c

02-21-2004, 06:16 AM	#17
Les Cooling Savant Join Date: Oct 2001 Location: Wigan UK Posts: 929	In fact/fantasy the DeltaT(metal -water) of ~ 50c(K) is close to my guess for a 250w load, using* h~ 10kw/mmK over all the dashpots' surface areas. * v~ 0.25m/s, d~ 1mm using Flomerics rather than Sieder-Tate(ish) calculations. Edit h ~ 23kw/mmk for the nozzle velocity (v) of 1m/s. This would reduce my guess Delta T from 67.5c to 39.75c Last edited by Les; 02-21-2004 at 03:00 PM.