Dynamics of droplet migration in oscillatory and pulsating microchannel flows and prediction and uncertainty quantification of its lateral equilibrium position using multifidelity Gaussian processes

The dynamics of a droplet in oscillatory and pulsating flows Newtonian fluid microchannel has been studied numerically. effects oscillation frequency, surface tension, channel flow rate have explored by simulating the drop within microchannel. These types introduce new equilibrium positions for compared to steady with similar conditions. simulation results are very sensitive grid resolution due unsteady behavior base flow. Therefore, set fine grids used this study capture physics problem more accurately. However, these make computations significantly expensive. multifidelity Gaussian processes method two levels fidelity predict remaining fine-grid simulations along their uncertainties based on correlations those coarse-grid cases over wide range input parameters.