Akkuş, Y.Çetin, BarbarosDursunkaya, Z.2018-04-122018-04-122017http://hdl.handle.net/11693/37673Date of Conference: 27-31 August 2017Conference Name: ASME 2017 15th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2017In this study, a computational model for the evaporation from a sessile liquid droplet fed from the center to keep the diameter of the droplet constant is presented. The continuity, momentum and energy equations are solved with temperature dependent thermo-physical properties using COMSOL Multi-physics. At the surface of the droplet, convective heat and evaporative mass fluxes are assigned. Since the flow field is affected by evaporative flux, an iterative scheme is built and the computation is automated using COMSOL-MATLAB interface. Correlations are implemented to predict the convective heat transfer coefficients and evaporative flux. Three different wall temperatures are used in simulations. The results show that the flow inside the droplet is dominated by buoyancy when the effect of the thermo-capillarity is neglected. The resulting flow generates a circulation pattern emerging from the entrance to the apex, along the surface of the droplet to the bottom heated wall and back to the entrance.EnglishDropsEvaporationHeat transferHeat transfer coefficientsMATLABMicrochannelsWalls (structural partitions)Circulation patternsComputational modelSessile liquid dropletTemperature dependentThermo-physical propertyThermocapillarityWall temperaturesHeat convectionConference Paper10.1115/ICNMM2017-5537