Premium
Modelling of the turbulent thermal boundary layer implemented in CFD code N3S and application to flows in heated and cooled rooms
Author(s) -
Delenne B.,
Manzoni D.,
Pot G.
Publication year - 1995
Publication title -
international journal for numerical methods in fluids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 112
eISSN - 1097-0363
pISSN - 0271-2091
DOI - 10.1002/fld.1650200605
Subject(s) - discretization , computational fluid dynamics , turbulence , finite element method , boundary layer , compressibility , mechanics , thermal , boundary value problem , flow (mathematics) , mathematics , mechanical engineering , computer science , engineering , physics , structural engineering , meteorology , mathematical analysis
This paper presents an efficient finite element method for solving the unsteady Navier–Stokes equations for turbulent incompressible flow coupled with thermal problems. This method has been implemented in the N3S code, developed at Electricité de France. The time discretization is first described. We precise then the Chorin and the ‘projected Uzawa’ algorithms used for the Stokes problem. Recent improvements concerning the optimization of finite element calculations are also detailed. The second part deals with the modelling of the thermal boundary layer used to simulate walls with fixed temperature in turbulent flows. The differences with other modelling suggested in the literature are discussed. The last part presents some applications. EDF is involved in the conception of heating or cooling systems and numerical methods constitute a very useful tool to study the movements of air in habitations. The calculations are validated by comparisons with measurements.