Give a comparative account of capillary
Answers
Answer: The rise of liquid in capillaries, or between two parallel plates as the 2D variant thereof, represents a challenging test case for two-phase flow solvers without a full analytic solution. Four different numerical approaches are compared for the rise of liquid, also providing reference data being of high relevance for capillarity-dominated wetting processes. The used methods are an Arbitrary Lagrangian–Eulerian method (Open FOAM solver inter Track Foam), a geometric Volume of Fluid code (FS3D), an algebraic Volume of Fluid method (Open FOAM solver inter Foam), and a level-set based extended discontinuous Galleria discretization (Boss).
While the transient rise height shows excellent agreement between the different implementations, the velocity fields at the interface demonstrate a different level of local accuracy of the available approaches. Reducing the slip length reduces the overall dynamics of the system, thus yielding a qualitative change in the rise behavior – a behavior that is not covered by simplified ODE models.
Previous article in issue Next article in issue
Keywords
Wetting Capillary rise Direct numerical simulation Naiver slip Multiphase flow Code to code comparison
Hope you got the correct answer
Please mark me as the brainliest