Numerical Investigation of the Effect of Sprue Base Design on the Flow Pattern of Aluminum Gravity Casting

Amir Baghani; Ahmad Bahmani; Parviz Davami; Naser Varahram; Mohsen Ostad Shabani

doi:10.4028/www.scientific.net/DDF.344.43

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HomeDefect and Diffusion ForumDefect and Diffusion Forum Vol. 344Numerical Investigation of the Effect of Sprue...

Numerical Investigation of the Effect of Sprue Base Design on the Flow Pattern of Aluminum Gravity Casting

Abstract:

Effects of sprue base size and design on flow pattern during aluminum gravity casting have been investigated by employing different sprue base sizes and using computational fluid dynamics (CFD). Calculations was carried out using SUTCAST simulation software based on solving Navier-Stokes equation and tracing the free surface using SOLA-VOF algorithm. Flow pattern was analyzed with focusing on streamlines and velocity distribution in sprue base, runner and in-gate. Increasing well size was produced a vortex flow at the bottom of sprue base which increased the urface velocity of liquid metal in runner. Using a rather big sprue well could eliminate vena contracta, but in-gate velocity was observed independent from well size. It assumes that in-gate velocity may be more influenced by other casting considerations. Using a curved sprue base could remove vortex flow at the bottom of sprue while keeping a nearly full contact between liquid metal and runner wall.

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Periodical:

Defect and Diffusion Forum (Volume 344)

Pages:

43-53

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.344.43

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Online since:

October 2013

Authors:

Amir Baghani, Ahmad Bahmani, Parviz Davami, Naser Varahram, Mohsen Ostad Shabani

Keywords:

Computational Fluid Dynamics (CFD), Gravity Casting, Sprue Base Design, Vena contracta

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