VMFL008

VMFL008
Flow Inside a Rotating Cavity

Overview

ReferenceJ.A. Michelsen. “Modeling of Laminar Incompressible Rotating Fluid Flow”. AFM 86-05., Ph.D. thesis. Department of Fluid Mechanics, Technical University of Denmark. 1986.
SolverAnsys Fluent, Ansys CFX
Physics/ModelsLaminar flow, Rotating reference frame
Input File
rotcv_RRF.cas for Ansys Fluent
VMFL008B_rot_cyl.def for Ansys CFX
Project FilesLink to Project Files Download Page

Test Case

Flow in a cylindrical cavity enclosed with a lid that spins at Ω = 1.0 rad/s. The flow field is 2–D axisymmetric, so only the region bounded by the dashed lines in Figure 10: Flow Domain needs to be modeled. The Reynolds number of the flow based on the cavity radius R and the tip-speed of the disk is 1800.

Figure 10: Flow Domain

Flow Domain

Material PropertiesGeometry Boundary Conditions

Density = 1 kg/m3

Viscosity: 0.000556 kg/m-s

Height of the cavity = 1 m

Radius of cavity =  1m

Speed of rotation of the moving wall = 1 rad/s

Rotational velocity for cell zone = -1 rad/s

Analysis Assumptions and Modeling Notes

The flow is laminar. The problem is solved using rotating reference frame.

Results Comparison for Ansys Fluent

Figure 11: Comparison of Distribution of Radial Velocity Along a Section at X= 0.6 m

Comparison of Distribution of Radial Velocity Along a Section at X= 0.6 m

Figure 12: Comparison of Distribution of Swirl Velocity Along a Section at X= 0.6 m

Comparison of Distribution of Swirl Velocity Along a Section at X= 0.6 m

Results Comparison for Ansys CFX

Figure 13: Comparison of Distribution of Radial Velocity Along a Section at X= 0.6 m

Comparison of Distribution of Radial Velocity Along a Section at X= 0.6 m

Figure 14: Comparison of Distribution of Swirl Velocity Along a Section at X= 0.6 m

Comparison of Distribution of Swirl Velocity Along a Section at X= 0.6 m