The need for accurate resolution of shock waves in Computational Fluid Dynamics (CFD) is a major driver in the development of robust numerical methods for approximating discontinuities. The Local Extremum Diminishing (LED) robustness concept has, for example, been introduced into the Finite Volume Method (FVM) for preventing overshoots at discontinuities (Jameson 1993). However, LED schemes hav...

In the present work, a parabolic trough solar (PTC) collector with inner helical axial fins as swirl generator or turbulator is considered and analyzed numerically. The three-dimensional numerical simulations have been done by finite volume method (FVM) using commercial CFD code, ANSYS FLUENT 18.2. spatial discretization of mass, momentum, energy equations, turbulence kinetic has obtained secon...

The necessity of conserving both scattered energy and asymmetry factor for ballistic incidence after either FVM or DOM discretization is convincingly shown by analyzing ultrafast laser radiative transfer in a cubic enclosure housing a participating medium. A phase-function normalization technique introduced previously by the present authors to correct for non-conservation of energy and asymmetr...

Abstract Dendritic deformation induced by convection of thermal fluid is one the factors leading to dendrite fragmentation and plays a crucial role in grain structure alloy, which lacks in-depth understanding. In this paper, we simulate flow-induced mechanical dendrites during solidification Al-4.5wt.%Cu alloy combining cellular automaton-finite volume method (CA-FVM) for growth finite element ...

The objective of the present paper is to revisit two well-known wind gust injection methods in a consistent manner and assess their performance based on different application cases. These are field velocity method (FVM) split (SVM). For this purpose, both consistently derived pointing out link Arbitrary Lagrangian Eulerian formulation geometric conservation law. Furthermore, differences between...

0017-9310/$ see front matter 2011 Elsevier Ltd. A doi:10.1016/j.ijheatmasstransfer.2011.11.009 ⇑ Corresponding author. E-mail address: [email protected] (Z. Guo). A new phase function normalization technique is developed for use with anisotropic scattering media and is applied to the conventional discrete-ordinates method. The new approach is shown to ensure conservation of both scattered en...

The aim of this article is a qualitative analysis of two modern finite volume (FVM) schemes. First one is the so called Modified Causon’s scheme, which is based on the classical MacCormack FVM scheme in total variation diminishing (TVD) form, but is simplified in such a way that the demands on computational power are much smaller without loss of accuracy. Second one is implicit WLSQR (Weighted ...

The radiative heat transfer problem is investigated numerically for 2D complex geometry biomass pyrolysis reactor composed of two pyrolysis chambers and a heat recuperator. The fumes are a mixture of carbon dioxide and water vapor charged with absorbing and scattering particles and soot. In order to increase gases residence time and heat transfer, the heat recuperator is provided with many incl...