M. Taha Janan and A. El Marjani
This paper aims to develop an efficient numerical method for simulating multicomponent flows by solving the system of conservative equations closed by a general two parameters…
Abstract
Purpose
This paper aims to develop an efficient numerical method for simulating multicomponent flows by solving the system of conservative equations closed by a general two parameters equation of state.
Design/methodology/approach
A finite difference method for solving the two‐dimensional Euler or Navier‐Stokes equations for multicomponent flows in a general curvilinear coordinate system is developed. The system of conservative equations (mass, momentum and energy) is closed with a general two parameters equation of state (ρe=(p+γp∞)/(γ−1)), which, associated to a γ‐formulation, allows easy computation of multicomponent flows. In order to enforce the stability of the numerical scheme, the Roe's flux‐difference splitting is adopted for the numerical treatment of the inviscid fluxes. The method is adapted to treat also unsteady flows by implementing an explicit Euler scheme.
Findings
The method was applied to compute various configurations of flows, ranging from incompressible to compressible fluid, including cases of single component flows or multicomponent ones. Computations show that the use of primitive variables instead of conservative ones, especially at low Mach numbers, improves the iteration process when the resolution is performed with a relaxation procedure such as Gauss‐Seidel method. Simulations of compressible flows with a strong shock show the ability of the present method to capture shocks correctly even with the use of primitive variables. To complete numerical tests, flows involving two fluids with the presence of interactions between a shock and a discontinuity surface have been treated successfully. Also, a case of cavitating flow has been considered in this work.
Originality/value
The present method permits the simulation of a large variety of multicomponent complexes flows with an efficient numerical taking advantage of Roe's flux‐difference splitting in curvilinear coordinate system.
Details
Keywords
Henner Andrés Solarte, Hendrys Fabián Tobar, Jorge Hernán Mesa, Helmuth Trefftz and Diana María Osorio
This study aims to find empirical evidence on how video games can foster innovation skills and change perceptions about entrepreneurship and general aspects related to the…
Abstract
Purpose
This study aims to find empirical evidence on how video games can foster innovation skills and change perceptions about entrepreneurship and general aspects related to the industry in Colombia while innovative pedagogical processes in teaching entrepreneurship in higher education.
Design/methodology/approach
Based on design-based research, serious games (SGs), entrepreneurial education and the innovator DNA framework, the authors collected data from undergraduate students enrolled in two online entrepreneurship courses at a Colombian university. One course is used as a treatment group where students play a video game created for the purpose of this research while the other group is used as control where traditional learning activities are performed. A self-reported method was used on the perceptions of the students after participating in the activities through questionnaires to find differences between the mean scores reported by both groups.
Findings
The results indicate that students who participated in the video game reported a higher fostering of their innovation skills and a broader change in their perception of entrepreneurship and aspects related to the coffee industry, in contrast to the students of the control group.
Originality/value
Using a video game created by EAFIT University in Colombia, this study responds to an identified need for studying the adequate use of SGs in online class contexts and the need of fostering both innovation skills and positive perceptions on entrepreneurship among students.