ISSN Online: 2377-424X
ISBN Print: 0-89116-299-2
International Heat Transfer Conference 7
A PIONEERING ERA IN CONVECTIVE HEAT TRANSFER RESEARCH
Sinopsis
Convective heat transfer research had a pioneering
era in the years between 1900 and 1930.
Wilhelm Nusselt demonstrated by similarity analysis
that a dimensionless parameter describing heat
transfer [the Nusselt number] can be expressed as a
function of Reynolds and Prandtl numbers for forced
flow of a constant property fluid and as a function
of Grashof and Prandtl numbers for natural convection.
This created the possibility to correlate
and generalize experimental results. Ernst Schmidt
formulated the heat-mass transfer analogy, again
for a constant property situation, which allows one to
obtain relations for mass transfer processes from
equations describing analogous heat transfer situations
without any additional experiments.
Analysis of heat transfer could be performed after Ludwig Prandtl simplified the Navier-Stokes equations to the boundary layer equations for fluids with small viscosity and after he had formulated the mixing length theory describing turbulent transport processes.
Much of our present knowledge and understanding of heat transfer is based on these pioneering contributions.
Analysis of heat transfer could be performed after Ludwig Prandtl simplified the Navier-Stokes equations to the boundary layer equations for fluids with small viscosity and after he had formulated the mixing length theory describing turbulent transport processes.
Much of our present knowledge and understanding of heat transfer is based on these pioneering contributions.