Simulation of the turbulent-energy redistribution in a diluted polymer solution.

Autor:	Voropaev, G., Dimitrieva, N.
Předmět:	SIMULATION methods & models TURBULENCE DILUTION POLYMER solutions REYNOLDS stress FRICTION drag TURBULENT boundary layer MOLECULAR weights
Zdroj:	Journal of Engineering Physics & Thermophysics; Jan2013, Vol. 86 Issue 1, p131-144, 14p, 13 Graphs
Abstrakt:	A model of transfer of the Reynolds stresses in a turbulent flow of a low-concentration aqueous polymer solution, taking into account the weight of the polymer and its concentration in this solution, is proposed. The influence of a polymer additive in such a solution on the turbulent diffusion and the redistribution of turbulent energy between the Reynolds-stress tensor components was numerically investigated. It is shown that a high-molecular-weight polymer additive in the indicated flow plays a crucial role in changing the intensity of the energy exchange between the turbulent-stress components, which manifests itself as an increase in the anisotropy of the solution and a decrease in the turbulent-energy production and leads to a decrease in the friction drag in the flow. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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