Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 8 of 8 for “"Solidification model"”.
-
Fluid Flow, Heat Flow and Macrosegregation in Axi-Symmetric Ingots
… casting in ESR. The fluid flow - segregation model involves the coupling of convective heat and fluid flow in the fully liquid metal pool ahead of the liquidus isotherm to the interdendritic fluid flow responsible for macrosegregation in the "mushy" zone of ingots solidifying under …
-
Micromechanical modeling of concrete at early age
… change significantly at early age due to solidification of its matrix component. Bažant’s solidification theory models concrete as a material solidifying in time. This approach is generalized to a three-dimensional characterization of a composite material with a solidifying matrix and …
-
Modeling transport phenomena and uncertainty quantification in solidification processes
… falling water. To gain insight into this complex solidification process, a fully transient model of DC casting was developed to predict the transport phenomena of aluminum alloys for various conditions. This model is capable of solving mixture mass, momentum, energy, and species conservation …
-
Heat transfer and microstructure during the early stages of solidification of metals
The future of solidification processing clearly lies not only in elucidating the various aspects of the subject, but also in synthesizing them into unique qualitative and quantitative models. Ultimately, such models must predict and control the cast structure, quality and properties of the cast …
-
Modelling of the binary alloy solidification process
A thermodynamically consistent model capable of modelling a binary alloy undergoing solidification or melting is developed. The theory is continuum based, and the solid-liquid phase change system is described macroscopically by a single set of conservation equations. The model is an extension of …
-
Control of constrained moving-boundary process with application to steel continuous casting
… first part of this dissertation, a mathematical model of the process and a state-of-the-art industrial control system are introduced. The steel casting process can be described as a single-phase Stefan problem under some simplifying but practically justified assumptions on the unknowns. The …
-
Study of spray-cooling control for maintaining metallurgical length or surface temperature during speed drop for steel continuous casting
… a simple but comprehensive heat transfer and solidification model - CON1D, and a real-time dynamic version of this model - CONOFFLINE (offline version of CONONLINE) are described. CONOFFLINE uses multiple 1-D models (CON1D) interpolated to give a 2-D prediction of transient evolution of steel …
-
The prediction of bubble defects in castings
Objective of this research was to develop models that capture the entrainment, breakup and transport of gas bubbles in solidifying TiAl castings. The candidate has reviewed the literature, programmed in FORTRAN code, and validated a number of competing techniques for two phase flow relevant to the …