VMFL024

VMFL024
Interface of Two Immiscible Liquids in a Rotating Cylinder

Overview

Reference T. Sugimoto, M. Iguchi, “Behavior of Immiscible Two Liquid Layers Contained in Cylindrical Vessel Suddenly Set in Rotation”. ISIJ International, Vol 42, pp. 338-343, 2002

Solver Ansys Fluent

Physics/Models Multiphase (Volume of Fluid), transient flow, body force

Input File

rot-cyl_2liq_vof.cas

Project Files Link to Project Files Download Page

Test Case

Laminar interface between two immiscible liquids, water and silicon oil, inside a vertical cylinder which is set in rotation starting from a state of rest. The silicone oil layer rests on top of the water due to its lower density. The cylinder is sealed at the top. The vessel is set to rotate with a constant angular velocity.

Figure 62: Flow Domain

Table 23: Materials, Geometry, and Boundary Conditions

Material Properties	Geometry	Boundary Conditions
Water : Density: 1030 kg/m³ Viscosity: 0.00103 kg/m-s Silicon Oil: Density: 935 kg/m³ Viscosity: 0.0103 kg/m-s	Diameter of the cylinder = 46 mm Height of the cylinder = 120 mm	All walls are set up at rotational speed of 2.39577 rad/s

Material Properties

Geometry

Boundary Conditions

Water :

Density: 1030 kg/m³

Viscosity: 0.00103 kg/m-s

Silicon Oil:

Density: 935 kg/m³

Viscosity: 0.0103 kg/m-s

Diameter of the cylinder = 46 mm

Height of the cylinder = 120 mm

All walls are set up at rotational speed of 2.39577 rad/s

Analysis Assumptions and Modeling Notes

The flow is laminar, unsteady and axisymmetric. Non-dimensionalized swirl velocity, defined as Swirl velocity / (Rotational speed X Cylinder radius) is used to validate the results.

Results Comparison for Ansys Fluent

Table 24: Comparison of the Non-Dimensional Swirl Velocity at Various Radial Locations (for a Given Axial Location, X = 20mm) at Time t = 80 s

Radial locations (at x = 20 mm)	Target	Ansys Fluent	Ratio
4.83 mm	0.21	0.2093	0.997
9.43 mm	0.41	0.4109	1.002
14.26 mm	0.62	0.6221	1.003