STUDY OF TURBULENT DOUBLE DIFFUSION IN A POROUS CAVITY WITH THE TWO ENERGY EQUATION MODEL

• Grant number: 12/07307-1
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: September 01, 2012
• End date: January 31, 2014
• Field of knowledge: Engineering - Mechanical Engineering - Transport Phenomena
• Principal Investigator: Marcelo Jose Santos de-Lemos
• Grantee: Ana Cristina Pivem
• Host Institution: Divisão de Engenharia Mecânica (IEM). Instituto Tecnológico de Aeronáutica (ITA). Ministério da Defesa (Brasil). São José dos Campos , SP, Brazil

Abstract

The present proposal aims the analysis of double diffusion flow with the two energy equation model, considering the local thermal non-equilibrium in a rigid porous medium, totally saturated by an incompressible and monophasic fluid for turbulent flow. The macroscopic equations of time average flow are developed based on the double decomposition concept (time fluctuations and spatial deviations) on theorem of average volumetric local and in the microscopic equations flow. It intends to demonstrate the additional transport mechanisms mathematically derived from the temporal fluctuations and spatial deviations of the temperature, mass concentration and velocity in all field of analysis. These equations are discretized by finite volume method with co-located arrangement of a system of non-orthogonal coordinated and the algebraic equations resulting are solved by the (SIP Proceeding Implicit Scheme) algorithm. The SIMPLE algorithm is used for coupling pressure - velocity.