In a dispersion of colloidal particles under evaporation, there is generation of a capillary force which bring the particles closer, if the evaporation rate is higher, the capillary flow will increase, but what about the capillary force? The capillary force depends on the surface tension of the liquid and its contact angle on the surface of the particles, but does its magnitude change with the evaporation rate?
Thank you for taking time to reply to my question.
Dear Soumia Cheddah,
I Hope this link will work for you.
Article Capillary assembly of colloidal particles on patterned surfaces
There is no direct functional dependence, but one should expect a strong indirect effect from the wet bulb temperature. That is, at high evaporation rate, the evaporative cooling produces a stronger drop in temperature which alters the surface tension and the contact angle.
Also, for pure solvent (no surfactant), temperature gradients due to evaporation produce Marangoni effect and viscous force in addition to the capillarity.
(ref. doi.org/10.1016/j.ces.2017.06.016)