Probability density function approach for multidimensional turbulent flow calculations with application to in-cylinder flows in reciprocating engines
Abstract
In the present extension of the pdf method to two- and three-dimensional transient turbulent flows, a general approach that is applicable to variable-density, chemically-reacting flows. Results are presented for nearly uniform density inert flows in three engine-like configurations: (1) a noncompressing axisymmetric cylinder-piston assembly with central port; (2) a noncompressing axisymmetric cylinder-piston with annular port; and (3) a compressing three-dimensional configuration with an off-center valve. The pdf results are compared with both measurements and conventional k-epsilon calculations for the two axisymmetric geometries. The feasibility of the pdf approach for complex turbulent flows is confirmed.
- Publication:
-
AIAA Journal
- Pub Date:
- February 1991
- DOI:
- 10.2514/3.10566
- Bibcode:
- 1991AIAAJ..29..208H
- Keywords:
-
- Computational Fluid Dynamics;
- Cylindrical Bodies;
- Engine Design;
- Probability Density Functions;
- Turbulent Flow;
- Finite Volume Method;
- K-Epsilon Turbulence Model;
- Mathematical Models;
- Monte Carlo Method;
- Ponderomotive Forces;
- Stream Functions (Fluids);
- Fluid Mechanics and Heat Transfer