The analysis of the turbulence model on turbulent flow in certain objects is important to
optimize the numerical simulation. To simulate rotating flow in crossflow turbine, the
numerical accuracy of the Renormalization Group (RNG) k-? model has better results than
the standard k-? model. To improve predictions of the standard k-? turbulent model can be
done by adjusting the constant value. This study discusses the effect of constant inverse-
Prandtl number in dissipation equation (? e) on the standard k-? turbulent model toward the …

Despite the successful use of the Standard 𝑘− 𝜀 model in simulating turbulent flow for many
industrially relevant flows, the model is still less accurate for a range of important problems,
such as unconfined flows, curved boundary layers, rotating flows, and recirculating flows. As
part of the authors' effort to extend the model applicability and reliability, this paper aims to
study the effects of diffusivity parameter called the turbulent Prandtl number of dissipation
rate (𝜎𝜀) on the Standard 𝑘− 𝜀 model performance for predicting recirculating flow in a …