Banks [4] concluded that the three-dimensional solution can be exhibited at a two-dimensional stagnation point for a
Prandtl number Pr = 0.72.
where Pr is the
Prandtl number, [C.sub.p] is the specific heat (j/kg-k), [mu] is the viscosity (kg/m-s), and k is the thermal conductivity (w/m-k).
This shows that the unsteady temperature gradient is reduced by high
Prandtl number fluid as well as increasing frequency of the fluctuating temperature and viscous dissipation fails to affect the temperature distribution.
where the Rayleigh number [Ra.sub.x], the nonlinear temperature parameter [gamma], the buoyancy parameter Nr, the
Prandtl number Pr, the Schmidt number Sc, the Peclet number [Pe.sub.x], and the Lewis number Le are defined as
Probes that work based on the
Prandtl principle are inserted into the filter bags measuring the actual cleaning pressure and gas velocity.
Del fisico Aleman Ludwig
Prandtl (1875-1953), pionero contribuidor en temas de aerodinamica, se dice que no podia resistir la tentacion de manipular y experimentar con cualquier juguete que se encontrara, a tal punto que abandonaba temporalmente cualquier tipo de evento en que estuviera participando para hacerlo (Vogel-Prandtl, 2004).
In Fig 3, effect of
Prandtl number (Pr) on non-dimensional temperature [theta] ([eta]) and temperature gradient [theta]' ([eta]) profiles are shown.
where primes denote differentiation with respect to [eta], Pr = [c.sub.p][mu]/[kappa] is the
Prandtl number, and R = [kappa]*[k.sub.1]/4[sigma][T.sup.3.sub.[infinity]] is the thermal radiation parameter.
Khidr and Mahmoud [5] obtained results for the case of an arbitrary
Prandtl number in strong shock waves, using a modified power law for viscosity in terms of temperature and Machnumber.
Whilst
Prandtl and others in Germany might subsequently have developed the theory, Lanchester was the originator of circulation theory and, in my view, should be more widely recognised.
where Pr is the
Prandtl number, M = [RB.sub.0] [square root of ([sigma] / [mu])] is the Hartmann number, Gr = [rho]g[beta][R.sup.2] ([T.sub.w] - [T.sub.[infinity]]) / [w.sub.0][mu] is the Grashoff number and Re is the Reynolds number.
The first such machine, dating to 1864, is credited to German inventor and brewer Antonin
Prandtl. His machine consisted of a vertical axis rotated by a crank handle on which a crossbar containing two small buckets was mounted.