Direct numerical simulation of viscoelastic turbulent channel flow exhibiting drag reduction: Effect of the variation of rheological parameters. (English) Zbl 0960.76057

Dimitropoulos, Costas D.; Sureshkumar, R.; Beris, Antony N.

J. Non-Newtonian Fluid Mech. 79, No. 2-3, 433-468 (1998).

From the summary: We present results from direct numerical simulations of fully turbulent channel flow of a polymer solution. Using constitutive equations derived from kinetic and network theories, in particular the FENE-P and the Gisekus models, we predict drag reduction for a variety of rheological parameters. The simulation algorithm is based on a semi-implicit time-splitting technique which uses spectral approximations in the spatial domain. The computations were carried out on a CRAY T3E-900 parallel supercomputer, under fully turbulent conditions.

MSC:

76M20	Finite difference methods applied to problems in fluid mechanics
76M22	Spectral methods applied to problems in fluid mechanics
76A10	Viscoelastic fluids
82D60	Statistical mechanics of polymers
76F65	Direct numerical and large eddy simulation of turbulence

Keywords:

dilute polymer solution; concentrated polymer solution; viscoelastic flow; direct numerical simulation; FENE-P model; Giesekus model; turbulent channel flow; drag reduction; semi-implicit time-splitting technique; CRAY T3E-900 parallel supercomputer