Articles written in Sadhana
Volume 48 All articles Published: 7 February 2023 Article ID 0022
Adaptive interface-Mesh un-Refinement (AiMuR) based Sharp-Interface
Level-Set-Method (SILSM) is proposed for both uniform and non-uniform Cartesian-Grid.
The AiMuR involves interface location based dynamic un-refinement (with
merging of the four control volumes) of the Cartesian grid away from theinterface.
The un-refinement is proposed for the interface solver only. A detailed numerical methodology is presented
for the AiMuR and ghost-fluid method based SI-LSM. Advantage of the novel as compared
to the traditional SI-LSM is demonstrated with a detailed qualitative as well as quantitative
performance study, involving the SI-LSMs on both coarse grid and fine grid, for three sufficiently
different two-phase flow problems:dam break, breakup of a liquid jet and drop coalescence.
A superior performance of AiMuR based SI-LSM is demonstrated - the AiMuR on a coarser non-uniform