Marangoni effect in nonequilibrium multiphase system of material processing

Abstract

In a nonequilibrium multiphase system, the Marangoni effect has important influence on interphase heat and mass transfer induced by interfacial tension gradient associated with either solutal or thermal gradients in numerous applications. Although the basic knowledge of the Marangoni effect has made great progress, its mechanism is not yet fully recognized. An in-depth understanding of the basic principles of heat and mass transport induced by the Marangoni effect is important for better operation of interphase transfer units. This report aims to provide a systematic study of the mechanisms of the Marangoni effect. Special foci are concentrated on the field of material processing, which encompasses the process wherein the raw materials are transformed into useful engineering products. A series of experimental, theoretical, or simulated results are extracted from the literature to elucidate the mechanism of the Marangoni effect and to rationalize the interphase transport phenomena. We examine the major physical explanations and attempt to distinguish the working principle behind the process. Perspectives are also proposed to trigger further innovative thinking about the topics. This work provides new insight into material processing by taking advantage of the Marangoni effect and has far-reaching implications in the design of future nonequilibrium multiphase system.

Transient Three-Dimensional Flow Field Measurements by Means of 3D µPTV in Drying Poly(Vinyl Acetate)-Methanol Thin Films Subject to Short-Scale Marangoni Instabilities

“…Experimental data on the stability threshold of Marangoni instabilities in drying polymer films are, however, scarce. Several authors have acknowledged this in the past [ 39 , 43 , 44 ]. In a recent comprehensive review on multiphase Marangoni convection, Wang et al explicitly stress the need for new quantitative experiments regarding convective instabilities in drying polymer films [ 44 ].…”

“…Several authors have acknowledged this in the past [ 39 , 43 , 44 ]. In a recent comprehensive review on multiphase Marangoni convection, Wang et al explicitly stress the need for new quantitative experiments regarding convective instabilities in drying polymer films [ 44 ]. Bassou et al reported experimental findings of cellular convective instabilities in drying polystyrene-toluene films with an initial thickness of – [ 18 ].…”

Direct Writing with Tilted-Front Femtosecond Pulses

“…The first one is the gradient force in the tilted front that could push the void out of the region of high intensity. The second is a thermocapillary force, which pushes the void into the region of high temperature and intensity (Marangoni effect) 53 . When the laser writing is in the direction against the tilt (Fig.…”

Sensitivity of lateral heat transfer on the convection onset in a transient Rayleigh-Bénard-Marangoni flow

“…Amongst the earlier works upon convective instabilities, we can mention the theoretical contribution by Pearson [17] for surface tension driven ows (Bénard-Marangoni instabilities) and the experiments by Blair and Quinn [4] for the buoyancy-driven ows (Rayleigh-Bénard instabilities). A recent numerical, experimental and theoretical review involving surface tension instabilities has been published by Wang et al [22] to elucidate the mechanisms of the Marangoni eect.…”