In order to examine the applicability of the RNGκ-εmodel and the Realizableκ-ε,A series of unsteady numerical simulations of the low specific-speed centrifugal pump at the design point and at ten off-design points were carried out with the two turbulence models.

Based on classical hydrodynamic theory, RNG κ-ε turbulence model is set.

For flow through a tunnel with a concave-convex boundary,the RNG κ-ε mathematical model was adopted to calculate the velocity and pressure tieeds and head loss under different conditions.

Numerical simulation with the standard k-ε model was performed to study single-phase convective heat transfer at the impinging zone of non-immersed slot jet.

K-ε model was dispersed by the co ntrol-volume method and solved by the SIMPLE algorithm.

Based on the consideration of the dispersed phase interaction with continuous phase, applying the k-ε model and the stochastic trajectory model with to the gas phase and solid phase,the particle motion trajectory was simulated successfully.

Numerical simulation of turbulence fFlow in spiraled and sprayed calciner using RNG k-ε models;

Evaluation of the RNG k-ε model on the numerical simulations of supercavitating flows around a hydrofoil;

Methane distribution in intake,robbing working surface and outtake was simulated using RNG k-ε model by Fluent according to conversation equation in turbulent state,turbulent kinetic energy equation and turbulent dissipation rate equation.