Inertial and Coriolis effects on oscillatory flow in a horizontal dendrite layer

Riahi, Daniel N.

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https://hdl.handle.net/2142/180 Copy

Description

Title

Inertial and Coriolis effects on oscillatory flow in a horizontal dendrite layer

Author(s)

Riahi, Daniel N.

Issue Date

2006-01

Keyword(s)

• rotating convection
• dendrite layer
• solidification
• oscillatory convection
• oscillatory instability
• inertial flow
• mushy layers
• stability analysis

Abstract

Flow instability due to oscillatory modes of disturbances in a horizontal dendrite layer during alloy solidification is investigated under an external constraint of rotation. The flow in the dendrite layer, which is modeled as flow in a porous layer under the Darcy’s law but with the inertial effects included, is assumed to rotate about the vertical axis at a constant angular velocity. The investigation is an extension of the work in Riahi (2003), which was for the case in the absence of the inertial effects. Results of the stability analyses indicate, in particular, that the Coriolis effect can enhance the physical domain for the oscillatory flow, while the inertial effect tends to reduce such domain. Sufficiently strong inertial effect can eliminate presence of the oscillatory mode only for the rotation rate beyond some value.

Series/Report Name or Number

TAM Reports 1082

Type of Resource

text

Language

en

Permalink

http://hdl.handle.net/2142/180

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