14th June 2011 - 02:20 AM
QUOTE (sahil+Jun 12 2011, 09:31 AM)
I'm looking at the fundamental aspects of heat transfer - as I'm not a mechanical/thermal engineer but soon to undergo a project wherein I need to deal with some aspects of thermal engioneering.
In the text, which I've been reading (for finite element analysis), it talks of mass transport wherein the medium of interest is a flowing fluid.
In such a case, heat flows by conduction, convection, and via motion of the
media. The last effect, referred to as mass transport.
My question is 'mass transport' same as forced convection? I guess it is because in forced convection aslo the fluid is in motion and so is in mass transport.
Can anyone throw some light please??
Are you working with reactor flow? I think you're right with the comparison. Convection and diffusion. Like the cat flow in a FCC unit.
Maybe this will help with some basic information. http://www.timedomaincvd.com/CVD_Fundament...rt/xprtTOC.html
14th June 2011 - 02:48 AM
QUOTE (bar_room_physist+Jun 14 2011, 12:25 AM)
do you mean 'mass transfer' ?
Mass transport is probably the same thing. In a fluid catalytic cracker the fluid is heavy gas oil in gas phase mass transporting [mixing with and pushing] a catalyst feeding a reaction space. Controls are something like 'catalyst flow' to 'feed flow' ratio, velocity, temperature, and pressure. Something like that. You want to get the design mass transport to feed flow so the mixing results in optimum conversion rate to gasoline. Something like that
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