double pipe heat exchangers: difficulty in defining conditions to initialize

ck3 · May 20, 2015, 13:24

I want to simulate the double pipe heat exchangers
The double pipe or the tube in tube type heat exchanger consists of one pipe placed concentrically inside another pipe having a greater diameter. The flow in this configuration cane be of two types: parallel flow and counter-flow.
Boundary Conditions:
Inner Inlet: Velocity Inlet 0.95 m/s (350 K); Inner Outlet: Pressure Outlet
Outer Inlet: Velocity Inlet 0.85 m/s (280 K); Outer Outlet: Pressure Outlet
What is the condition that I have to choose to initialize my simulation?

CFDYourself · May 24, 2015, 12:28

"What is the condition that I have to choose to initialize my simulation? "

can you give more information on what it is you're looking for ?

amirokhovat · May 26, 2015, 06:02

Hi
Initialize is only a guess to start calculation. Initialize only affect on convergence speed.

May 20, 2015, 13:24	double pipe heat exchangers: difficulty in defining conditions to initialize	#1
ck3 Member Khaled Join Date: Mar 2009 Posts: 53 Rep Power: 17	I want to simulate the double pipe heat exchangers The double pipe or the tube in tube type heat exchanger consists of one pipe placed concentrically inside another pipe having a greater diameter. The flow in this configuration cane be of two types: parallel flow and counter-flow. Boundary Conditions: Inner Inlet: Velocity Inlet 0.95 m/s (350 K); Inner Outlet: Pressure Outlet Outer Inlet: Velocity Inlet 0.85 m/s (280 K); Outer Outlet: Pressure Outlet What is the condition that I have to choose to initialize my simulation?

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May 24, 2015, 12:28		#2
CFDYourself Member Jim Join Date: May 2015 Posts: 47 Rep Power: 10	"What is the condition that I have to choose to initialize my simulation? " can you give more information on what it is you're looking for ?

May 26, 2015, 06:02		#3
amirokhovat New Member amir okhovat Join Date: Sep 2011 Location: Iran- Isfahan Posts: 24 Rep Power: 14	Hi Initialize is only a guess to start calculation. Initialize only affect on convergence speed.