(660i) Lattice Boltzmann Simulations of Foam Drainage and Oscillation and Comparison with Experiments on Microfluidically Generated Foams
Furthermore, the LBM simulations are compared to free drainage experiments of foams. A microfluidic cell which uses flow focusing to create a monodisperse train of bubbles is directed into a chamber to form a two dimensional wet foam. The gravity driven drainage of this foam is imaged, and the coalescence (interfacial area) and foam height are measured as a function of time. These results are compared to the LBM simulations by directly comparing simulation and experimental images, and fitted by varying the pseudopotential or disjoining pressure isotherm. We demonstrate that the isotherm (the pseudopotential) controls the bubble coalescence and wet/dry foam transition.