RE: Laminar layer heat transfer

From: <Steve>
Date: Fri Jun 13 2003 - 05:11:00 EDT

Hi Andrew
I assume you are talking about the boundary layer, or laminar sublayer which clings to the surface when the bulk flow is turbulent. It is a tedious subject, but well handled on any number of books on heat transfer. In fact I think if you Google "Heat Transfer, Boundary Layer Thickness" you may find what you are looking for. Failing that try "Film Coefficient" as the early basis of heat transfer was that the coefficient was essentially the conduction of heat across a laminar sublayer. If you know the liquid conductivity and heat transfer coefficient for your case, you can work backwards to approximate the boundary layer. Suggest you locate a copy of "Heat Transfer" by McAdams. This book is probably the best starting point.

Cheers

Steve McKenzie

-----Original Message-----
From: Andrew Lindsay [mailto:andrewl@global.net.au] Sent: Friday, June 13, 2003 6:51 PM
To: PipingDesign@yahoogroups.com
Subject: [PipingDesign] Laminar layer heat transfer

Dear group,

Can anyone help me, I need to calculate the thickness of a laminar layers.

The two situations that I want to model are as follows.

I have a pipe with water flowing across the length of the pipe, and I want to
calculate the thickness of the laminar layer (on the outside surface of the pipe).

For the second situation, I would like to calculate the laminar layer thickness with the fluid flowing along the length of the pipe.

Thirdly, I would like to calculate the laminar layer thickness of rfluid flowing across a flat plate.

Any assistance would be greatly appreciated.

Best regards

Andrew Lindsay

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Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Received on Fri Jun 13 05:11:00 2003