B209 Numerical Simulation on Heat and Mass Transfer in a Falling Liquid Film with Interfacial Waves

Three‐dimensional wave dynamics on a falling film and associated mass transfer

“…Recent numerical simulations have denied such localized turbulence at Ž . low ReNagasaki et al, 2002;Miyara, 2000 . Comparison of the present Sh data with the solution by Ž .Tamir and Taitel 1971 shows that surface waves rapidly increase the mass-transfer coefficient, k , with Re up to 2.6 L times the solution at Res 40, associated with large differences in the slope, and then gently increase k with a small L slope to 2.2 times the solution at Res 400. Emmert and Pig-…”

“…Ž . film flow by Nagasaki et al 2002 andMiyara 2000 , and the experimental observations of the wave dynamics and the mass Ž . Ž .…”

“…Ž . Numerical simulation techniques Nagasaki et al, 2002 and Ž velocity profile measurement methods Karimi and Kawaji, . 1998 developed recently seem to be useful in aiding such an understanding of flow structures.…”

Wave-augmented mass transfer in a liquid film falling inside a vertical tube

“…This may be attributed to the growth of the concentration boundary layer in the films. Miyara's [32] and Nagasaki et al's [33] numerical simulations of wavy film flow and diffusion into the film showed that humps have gentle flow circulations in the near-peak regions of the humps, and the flow is rather smooth laminar (or not wavy) near the wall under the humps and in the substrate between humps. The hump-induced convections seem to cause partial renewals of the concentration boundary layer at and near the film surface [30], but the layer continuously grow in the near-wall region under humps and between humps, and therefore Sh decreases with increasing length of the developing boundary layer, i.e.…”

Optimal Regimes of Heat-Mass Transfer in a Falling Film

“…In [3], numerical simulations are performed on the flow and mass transfer in a laminar liquid film falling down along a vertical wall by using the boundaryfitted coordinate system. Unfortunately, the authors apply incorrect periodic boundary conditions in the flow direction, which makes their results faulty.…”