Simulation of Heat Transfer in Tubes in Fluent Software

wazard · January 1, 2018, 12:35

hi,
a steel tube is used to transfer cold materials. The internal diameter of the pipe is 36 mm and the thickness
It is 2 mm. Medium temperature and ambient air are 6 degrees Celsius and 23 degrees Celsius, and coefficients
The corresponding displacement is 400 W / m2k and 6 W / m2k respectively.
A) What is the rate of heat transfer to the drug per unit length of the tube?
B) If the insulation of calcium silicate is of thickness of 04 mm and with conductivity coefficient of 0.5 W / mk on the pipe What is the rate of heat transfer per unit pipe?

DEd · January 2, 2018, 17:23

An overall heat transfer coefficient (defined for the outer/larger area) for a circular pipe with internal and external convective heat transfer can be written in the following way.

I wouldn't say it's right to define a heat transfer rate per unit length as it depends on the flow rate (perhaps a heat transfer *coefficient* per unit length)

$\frac{1}{h_{tot}}=\frac{1}{h_o}+\frac{r_o}{k} \cdot ln\left (\frac{r_o}{r_i} \right )+\frac{r_o}{r_i\cdot h_i}$

January 1, 2018, 12:35	Simulation of Heat Transfer in Tubes in Fluent Software	#1
wazard New Member saman Join Date: Jan 2018 Posts: 1 Rep Power: 0	hi, a steel tube is used to transfer cold materials. The internal diameter of the pipe is 36 mm and the thickness It is 2 mm. Medium temperature and ambient air are 6 degrees Celsius and 23 degrees Celsius, and coefficients The corresponding displacement is 400 W / m2k and 6 W / m2k respectively. A) What is the rate of heat transfer to the drug per unit length of the tube? B) If the insulation of calcium silicate is of thickness of 04 mm and with conductivity coefficient of 0.5 W / mk on the pipe What is the rate of heat transfer per unit pipe?

January 2, 2018, 17:23		#2
DEd Member Daniel Edebro Join Date: Feb 2016 Location: Gothenburg Posts: 41 Rep Power: 10	An overall heat transfer coefficient (defined for the outer/larger area) for a circular pipe with internal and external convective heat transfer can be written in the following way. I wouldn't say it's right to define a heat transfer rate per unit length as it depends on the flow rate (perhaps a heat transfer coefficient per unit length) $\frac{1}{h_{tot}}=\frac{1}{h_o}+\frac{r_o}{k} \cdot ln\left (\frac{r_o}{r_i} \right )+\frac{r_o}{r_i\cdot h_i}$ Last edited by DEd; January 2, 2018 at 18:32.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Error - Solar absorber - Solar Thermal Radiation	MichaelK	CFX	12	September 1, 2016 05:15
Conduction and Convection Heat Transfer rate in Fluent Results	Onurozcan	FLUENT	0	January 14, 2016 12:39
Question about heat transfer simulation	Anna Tian	Main CFD Forum	0	January 25, 2013 18:53
simulation software Fluent.	zerar zahir	FLUENT	0	May 29, 2011 13:02
Heat transfer in an unsteady-state simulation	Raed141	FLUENT	11	August 7, 2009 17:17