Abstract:
Accurate numerical simulation of liquid draining is important to study the physics fluid flow.
However, liquid draining involves multiphase and rotational flows, where numerical
simulation is expensive to accurately recreate these flow behaviors. The accuracy of
numerical results has been also debatable and it is mainly affected by the computational
modeling approaches. Therefore, this study evaluates different computational modelling
approaches such as DNS, RANS k-ε, RANS k-ω and LES turbulence models. The results for
the draining time and flow visualization of the generation of an air-core are in a good
agreement with the available published data. The Direct Numerical Simulation (DNS)
seems most reasonably satisfactory for VOF studies relating air-core compared to other
different turbulence modeling approaches
