VMFL031

VMFL031
Turbulent Flow Behind an Open-Slit V Gutter

Overview

Reference

J.T. Yang, G.L. Tsai, “Near-wake flow of a v-gutter with slit bleed”. Journal of Fluid Engineering. Vol 115. pp. 13-20, 1993

SolverAnsys Fluent
Physics/ModelsTurbulent flow
Input File
spltvee.cas
Project FilesLink to Project Files Download Page

Test Case

The near-wake flow structure behind an open-slit V gutter at airflow speed of 20 m/s is modeled. The interaction between the flow penetrating through the open slit and the shear layer results in an asymmetric wake flow structure. The size of the entire recirculation zone shifts toward one of the two wings due to the Coandă effect.

Figure 80: Flow Domain

Flow Domain

Material PropertiesGeometry Boundary Conditions

Density: 1 kg/m3

Viscosity: 1.8333 X 10-05 kg/m-s

L = 40 cm

H = 10 cm

a = 2 mm

b = 22 mm

ø= 45°

uinlet = 20 m/s

kinlet = 0.04335 m2/s2

εinlet = 0.2119 m2/s3

Analysis Assumptions and Modeling Notes

Steady, turbulent, incompressible flow. The standard k-ε model is used for turbulence.

Results Comparison for Ansys Fluent

The x-velocity at x = 22 mm downstream of the split-V-gutter, is compared with experimental data.

Figure 81: X-Velocity at x = 22 mm Downstream of the V-Gutter

X-Velocity at x = 22 mm Downstream of the V-Gutter

Figure 82: The Coandă Effect

The Coandă Effect