Published in Materials
A series of experiments involving the detonation of PBX 9501 encased in a copper cylinder are modeled with the objective of evaluating a proposed set of phenomenological parameters for the Wescott–Stewart–Davis reactive burn model. The numerical analysis is conducted using the Los Alamos continuum mechanics code FLAG. Numerical considerations perta...
ABSTRACT The thermal efficiency of naturally ventilated greenhouses is limited due to the permanent exchange of air through the vents, especially during the night hours. The objective of the work consisted in evaluating a system of inflatable air ducts that close the roof vents during the night as a strategy to reduce the energy loss during these h...
Published in Mechanics & Industry
In this paper, the effect of turbulent flow on the thermal stresses and strains created in an annular finned-tube bundle is studied. The finite volume method and the transition SST model, along with the SIMPLE algorithm, are used to solve the flow equations, and the finite element method is used to solve the thermal stress equations in solid. The r...
Razvita in numerično implementirana je simulacija mikrostrukture in mikroizcejanja v dveh dimenzijah za problem strjevanja večsestavinskih aluminijevih zlitin. Iz makroskopskega simulacijskega okolja za polkontinuirno litje je pridobljena temperaturna zgodovina za del področja na katerem je simulirana mikrostruktura. Upoštevana je heterogena nuklea...
Published in Transactions on Aerospace Research
Numerical studies on detonation wave propagation in rotating detonation engine and its propulsive performance with one- and multi-step chemistries of a hydrogen-based mixture are presented. The computational codes were developed based on the three-dimensional Euler equations coupled with source terms that incorporate high-temperature chemical react...
Published in Computational Mathematics and Mathematical Physics
AbstractA new method for the numerical solution of the passive scalar transport equation in the framework of hydrodynamic equations in the shallow water approximation is described. The method is based on previously developed quasi-gasdynamic algorithms for numerical simulation of compressible gas flows. Smoothed equations are derived, and their dif...
Published in Doklady Mathematics
AbstractA mathematical model for viscous gas flow simulation with time scales bounded by the characteristic time between molecular collisions is considered. This approach is a variant of the quasi-gasdynamic system of equations, which is based on the relationship between the kinetic and macroscopic descriptions of continuous medium motion. Based on...
A higher order interpolation scheme based on a multi-stage BVD (Boundary Variation Diminishing) algorithm is developed for the FV (Finite Volume) method on non-uniform, curvilinear structured grids to simulate the compressible turbulent flows. The designed scheme utilizes two types of candidate interpolants including a higher order linear-weight po...
In the present study, the simulation of the three-dimensional (3D) non-isothermal, non-Newtonian fluid flow of polymer melts is investigated. In particular, the filling stage of thermoplastic injection molding is numerically studied with a solver implemented in the open-source computational library O p e n F O A M ® / . The numerical method is b...
Published in Mechanics & Industry
In this study, the influence of radiation heat transfer within a planar SOFC is investigated. The numerical model is made by performing two-dimension mathematical model describing mass, momentum and heat transport phenomena coupled with electrochemical reactions. The finite volume method is used to solve the governing equations. Compared with liter...
