As a category of challenging flow problems, flows with moving boundaries and interfaces, includes fluid–particle, fluid–object and fluid–structure interactions; free-surface and two-fluid flows; and flows with moving mechanical components. To address the challenges involved in computation of this category of problems, we developed a number of interface-tracking and interface-capturing technique...

In this thesis, computational interface capturing methods for mathematical models related to fluid phase change processes in porous media are studied. The mathematical models are often singular and degenerate, which contributes to the computational difficulty. An analysis of a smoothing method applied to a one dimensional free interface problem is presented. An asymptotic analysis shows the dep...

This paper describes a new approach to visualization of scenarios within the use case-based engineering of functional requirements – the so-called Video Camera metaphor. The Video Camera metaphor facilitates involvement of business people, customers, problem domain experts and other non-technical stakeholders into capturing and validating formal requirements models. The key tool, supporting the...

In this work, rising of a single bubble in a quiescent liquid under microgravity condition was simulated. The related unsteady incompressible full Navier-Stokes equations were solved using a conventional finite difference method with a structured staggered grid. The interface was tracked explicitly by connected marker points via hybrid front capturing and tracking method. One field approximatio...

Abstract Traditionally, lexical typology has to a large extent been interested in categorization of various cognitive domains (e. g., colour , perception body) i. e., how these are cut up by the most important words language, and motivation or formal relatedness, whether for certain concepts completely unrelated related others via polysemy derivation intransitive vs. transitive verbs, ‘day’ ‘su...

Abstract This paper presents simulations of the growth stationary and rising vapour bubbles in an extend pool liquid using Interface Capturing Computational Fluid Dynamics (CFD) methodology coupled with a method for simulating interfacial mass transfer at vapour-liquid interface. The model enables mechanistic prediction local rate phase change interface is applicable to realistic cases involvin...

This paper presents a new volume-of-fluid scheme (M-CICSAM), capable of capturing abrupt interfaces on meshes of arbitrary topology, which is a modification to the Compressive Interface Capturing Scheme for Arbitrary Meshes (CICSAM) proposed in the recent literature. Without resort to any explicit interface reconstruction, M-CICSAM is able to precisely model the complex free surface deformation...