calculation of value of convective heat transfer coefficient for a bank of cylinders

sidrameshrath · May 26, 2014, 04:13

hi guys
I am new at using ansys and the problem i have in hand is to find the cooling time for a array of cylinderical wires from 80degree celius to 50 degree celius
the conditions are
laminar cross flow over the cylinder
forced convection
I somehow managed to get the empirical fomulation of convective heat coefficient for a single wire using empirical corelations
but what should i do find the h for a in line configuration of cylinderical wires
I read that it can be done using CFX ansys but i am unable to do it
I know that the h will vary as the air flows over the cylinders in one row
Please help
an early response will be appreciated
Please if anyone has any idea kindly do share
I am in deep trouble and not getting any help

Rami · June 10, 2014, 05:35

Hi sidrameshrath,

Have a look at works of Zukauskas, e.g., in the book
A. Zukauskas, Heat transfer from tubes in cross flow, Advances in Heat Transfer (Eds. Hartnett, J. P. and Irvine T. F.) 18, 87-159, 1987.
or a book named Tube banks in crossflow by the same author.
He covered this topic.

May 26, 2014, 04:13	calculation of value of convective heat transfer coefficient for a bank of cylinders	#1
sidrameshrath New Member sid Join Date: May 2014 Posts: 5 Rep Power: 12	hi guys I am new at using ansys and the problem i have in hand is to find the cooling time for a array of cylinderical wires from 80degree celius to 50 degree celius the conditions are laminar cross flow over the cylinder forced convection I somehow managed to get the empirical fomulation of convective heat coefficient for a single wire using empirical corelations but what should i do find the h for a in line configuration of cylinderical wires I read that it can be done using CFX ansys but i am unable to do it I know that the h will vary as the air flows over the cylinders in one row Please help an early response will be appreciated Please if anyone has any idea kindly do share I am in deep trouble and not getting any help Last edited by sidrameshrath; May 29, 2014 at 07:13. Reason: no reply

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June 10, 2014, 05:35		#2
Rami Senior Member Rami Ben-Zvi Join Date: Mar 2009 Posts: 155 Rep Power: 17	Hi sidrameshrath, Have a look at works of Zukauskas, e.g., in the book A. Zukauskas, Heat transfer from tubes in cross flow, Advances in Heat Transfer (Eds. Hartnett, J. P. and Irvine T. F.) 18, 87-159, 1987. or a book named Tube banks in crossflow by the same author. He covered this topic.