Inertia dominated flow and heat transfer in liquid drop spreading on a hot substrate

An experimental investigation into the spread and heat transfer dynamics of a train of two concentric impinging droplets over a heated surface

“…From these works, it is identified that wall temperature is lowest at the impact point and increase in the radial direction toward the edge of the droplet. Investigators [24,25] also found that the evaporation rate is highest at the three-phase contact line and several numerical predictions [17,20,[26][27][28][29][30] have confirmed these observations. Nucleate boiling regime is the region extended from the point of bubble nucleation, which will take place when wall temperature is above the saturation temperature, to the critical heat flux point which corresponds to shortest droplet evaporation time.…”

“…Bond number, Bo = ρ l gD 2 4σ lv (18) Reynolds number, Re = ρ l DU µ (19) Weber number, We = ρ l DU 2 σ lv (20) Maximum spread factor, S * max =…”

“…Film evaporation takes place when the wall temperature is below the liquid's saturation temperature, and even when the wall is superheated but insufficient to initiate bubble nucleation inside the drop upon contact with the surface [7]. It is observed that, in film evaporation regime, droplet heat transfer is affected by temperature variations inside the droplet, wall heat flux and droplet evaporation rate [17][18][19][20][21]. Chandra et al [22] investigated the effect of contact angle on droplet evaporation rate by experimental investigation.…”

Modelling impingement of hollow metal droplets onto a flat surface

“…While experimental investigations can link these factors to a final coating morphology, computer simulations are now providing further scientific insight to the impingement process, the physics of the coating build up and in tuning the process parameters. Therefore significant effort is being devoted to the modelling and simulation of the particle impingement process (Pasandideh-Fard et al, 1998Aziz and Chandra, 2000;Ahmed and Rangel, 2002;Shakeri and Chandra, 2002;Kamnis and Gu, 2005;Yang et al, 2011;Kamnis et al, 2008;Shi et al, 2004;Li and Christofides, 2005;Berberovic et al, 2011;Bhardwaj and Attinger, 2008).…”

Coalescence, Spreading, and Rebound of Two Water Droplets with Different Temperatures on a Superhydrophobic Surface

“…Both the heat transfer to the solid surface and also the condensation would increase the attractive interaction between droplets and the surface and also the pinning of the liquid to the surfaces. 53−55 As the temperature of the merged droplet increased, the droplet gradually transferred from the initial Cassie state to a partial Wenzel state. 36,56 The combination of these factors made the droplet prone to be stuck on the surface.…”