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Article #161Re: nasa-celebrates-successful-mars-landing
From: Tim Williams
Date: Wed, 08 Aug 2012 22:57
Date: Wed, 08 Aug 2012 22:57
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Convection is the transfer of heat to and from a fluid. This is true whether the fluid flows by change in density or by an external force, and includes diffusion, which occurs in space even when the laptop's fan is off. The component of heat transfer due entirely to mass flow is called advection, and does not include diffusion. Tim -- Deep Friar: a very philosophical monk. Website: http://webpages.charter.net/dawill/tmoranwms "Walter Banks" <walter@bytecraft.com> wrote in message news:50225B5D.1F7B950C@bytecraft.com... > > > George Herold wrote: > >> On Earth once the temp difference is above a few degrees I think >> convection is the biggest source of heat transfer. But I have no idea >> of how that changes with pressure. Maybe some day I can build a >> convectron pressure gauge. The patent on that must be expired. > > Convection flow requires gravity. Laptops on various space labs > starting with the skylab and Shuttle found out about this. For > convection to work it needs gravity so the lighter heated air > moves *up* being displaced by cooler heavier air. On Mars > no problem except the amount of heat the atmosphere can carry. > > w.. > >
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From: "Tim Williams" <tmoranwms@charter.net>
Newsgroups: sci.electronics.design,aus.electronics,comp.arch.embedded
Subject: Re: nasa-celebrates-successful-mars-landing
Date: Wed, 8 Aug 2012 17:57:21 -0500
Organization: A noiseless patient Spider
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