VMFL073

VMFL073
Turbulent Separated Flow in an Axisymmetric Diffuser

Overview

Reference	Nitsche, Wolfgang & Haberland, Christoph. (1993). On Turbulent Separated Flows in Axisymmetric Diffusers. 10.1007/978-3-663-13986-7_17.
Solver	Ansys Fluent
Physics/Models	Turbulence, Separation
Input File	`VMFL073_FLUENT.cas`
Project Files	Link to Project Files Download Page

A fully developed turbulent flow is modeled in an axisymmetric diffuser. Half angle of 90° is selected for the present study.

Figure 171: Flow Domain

Material Properties	Geometry	Boundary Conditions
Density: 1.22478 kg/m³ Viscosity: 1.7894e-05 kg/m-s	Half angle = 90 degrees Inlet radius = 0.025 m Outlet radius = 0.04 m	Fully developed turbulent profile at inlet with an average velocity = 14.61 m/s

Material Properties

Geometry

Boundary Conditions

Density: 1.22478 kg/m³

Viscosity: 1.7894e-05 kg/m-s

Half angle = 90 degrees

Inlet radius = 0.025 m

Outlet radius = 0.04 m

Fully developed turbulent profile at inlet with an average velocity = 14.61 m/s

Steady turbulent flow is assumed. An SST k-w model is used for turbulence.

Figure 172: Comparison of Skin Friction Coefficient along the Diffuser Wall