The importance of air bubble dynamics in liquid is some phenomena like chemical and biochemical processes refinery units. 2D Volume Fluid (VOF) method together with the CFD technique were employed for simulating. dynamic meshing used to simulate hydrodynamics rising water column via User Defined Function (UDF) code C++ environment was developed evaluate through column. a stagnant has been consi...

In this paper, we investigated the dynamics of a bubble rising inside ratchet channels filled with viscoelastic liquids by means volume-of-fluid-based direct numerical simulations. The exponential Phan–Thien–Tanner constitutive model was used to describe rheological behaviors nonlinear fluid. effects fluid elasticity [characterized relaxation time (λ)] and angle (θ) are mainly discussed in resp...