Alan Rominger
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 7h comment How can I get the exit temperature of water entered 100 degree in a pipe surrounded by 30 degree water? It sounds like you had an equation for the LMTD of a parallel flow configuration and wanted to just plug your numbers in. I honestly don't know how detailed your class is going, but you're probably starting out knowing the convective heat transfer coefficient (along with the others). It'll probably be faster to write the heat transfer differential equation and solve it than trying to look something up. It's going to be a decreasing exponential. Just write dT/dx with Newton's cooling law and go from there. Apr 27 comment Navier-Stokes Energy Equation I was equating the internal heat source (term with $q'''$ from the link) to heating from viscous heating (term with $\mu$ in the equation). This is unlike the other sources, because it doesn't involve heat entering the unit cell through the boundaries. It is thermal energy produced volumentrically inside the unit cell. Apr 26 answered Navier-Stokes Energy Equation Apr 23 awarded Nice Question Apr 21 awarded Popular Question Apr 18 awarded Popular Question Apr 2 awarded Notable Question Mar 29 awarded Nice Answer Mar 19 awarded fluid-dynamics Feb 1 awarded Popular Question Jan 14 awarded Yearling Jan 10 awarded Popular Question Jan 8 awarded Famous Question Dec 20 awarded Popular Question Dec 13 comment Falling Raindrop with Asymptotic Acceleration FYI, I think you left out density when substituting for $m$. Oct 31 awarded Nice Question Oct 19 awarded Nice Answer Oct 19 awarded newtonian-mechanics Oct 18 answered Where does the energy go in a rocket when no work is done? Oct 18 awarded Revival