Numerical Modeling of Fluid Flow and Solidification Characteristics of Ultrasonically Processed A356 Alloys

Direct Numerical Simulation of Solidification Microstructures Affected by Fluid Flow

The e ects of uid ow on the solidi cation morphology of pure materials and solute microsegregation patterns of binary alloys are studied using a computational methodology based on a front tracking/ nite di erence method. A general singleeld formulation is presented for the full coupling of phase change, uid ow, heat and solute transport. This formulation accounts for interfacial rejection/absor...

Impact Properties of A356-T6 Alloys

The Charpy impact energy of A356 alloys has been measured. Instrumented Charpy impact tests have been conducted at 25, 100, 150, and 200 ~ The Charpy specimens were machined from plate castings or tapered cylindrical castings. The plates were produced in sand molds, and tapered cylinders were produced in water-cooled copper molds. Both unmodified and strontium-modified castings were tested. The...

Numerical Investigation of Fluid Flow Characteristics Around Slide Gates Using Multi-Zonal Method

One method of solving the governing equations of fluid flow about complex geometries is to use multi-zonal method. In this method the overall domain is divided into small number of simpler domains. In each zone, the flow field is solved independently of other zones. The boundary conditions for connecting zones are enforced to convey the necessary linkage. This multi – zonal procedure has been a...

Numerical Investigation of Fluid Flow Characteristics Around Slide Gates Using Multi-Zonal Method

One method of solving the governing equations of fluid flow about complex geometries is to use multi-zonal method. In this method the overall domain is divided into small number of simpler domains. In each zone, the flow field is solved independently of other zones. The boundary conditions for connecting zones are enforced to convey the necessary linkage. This multi – zonal procedure has been a...

Multiscale Modeling of Solidification of Multi-component Alloys