Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site sdccs7.UUCP Path: utzoo!watmath!clyde!burl!ulysses!mhuxl!ihnp4!zehntel!dual!amd!decwrl!decvax!ittvax!dcdwest!sdcsvax!sdccs7!drabik From: drabik@sdccs7.UUCP Newsgroups: net.physics Subject: Hot Wire Anemometers Message-ID: <1269@sdccs7.UUCP> Date: Wed, 1-Aug-84 08:33:39 EDT Article-I.D.: sdccs7.1269 Posted: Wed Aug 1 08:33:39 1984 Date-Received: Sat, 4-Aug-84 01:35:05 EDT Organization: U.C. San Diego, Computer Center Lines: 22 Hot wire anemometers are being used to measure mass flow rate of intake air in many modern automobile engines. The operation of these devices depends on the properties of heat transfer by forced convection past a body (e.g. a circular cylinder). Can anyone tell me what the functional dependence is of heat flow with respect to temperature of the cylinder, temperature of the ambient air, velocity of the air, and density of the air (at low Reynolds numbers), that is, in dQ/dt = f (v, rho, Ta, Tw), what is the form of f? It seems that, by being clever, one can use only one (or maybe two) wires and measure mass flow directly. This I would like to know. Thanks in advance, Tim Drabik ...sdccs7!drabik UCSD EECS