The Experts below are selected from a list of 1215 Experts worldwide ranked by ideXlab platform
Latifa Begum - One of the best experts on this subject based on the ideXlab platform.
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semi continuous casting of magnesium alloy az91 using a filtered Melt Delivery System
Journal of Magnesium and Alloys, 2015Co-Authors: Mainul Hasan, Latifa BegumAbstract:Abstract A 3-D numerical simulation of an industrial-sized slab caster for magnesium alloy AZ91 has been carried out for the steady state operational phase of the caster. The simulated model consists of an open-top Melt Delivery System fitted with a porous filter near the hot-top. The Melt flow through the porous filter was modeled on the basis of Brinkmann-Forchimier-Extended non-Darcy model for turbulent flow. An in-house 3-D CFD code was modified to account for the Melt flow through the porous filter. Results are obtained for four casting speeds namely, 40, 60, 80, and 100 mm/min. The metal-mold contact region as well as the convective heat transfer coefficient at the mold wall were also varied. In addition to the above, the Darcy number for the porous media was also changed. All parametric studies were performed for a fixed inlet Melt superheat of 64 °C. The results are presented pictorially in the form of temperature and velocity fields. The sump depth, mushy region thickness, solid shell thickness at the exit of the mold and axial temperature profiles are also presented and correlated with the casting speed through regression analysis.
Mainul Hasan - One of the best experts on this subject based on the ideXlab platform.
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semi continuous casting of magnesium alloy az91 using a filtered Melt Delivery System
Journal of Magnesium and Alloys, 2015Co-Authors: Mainul Hasan, Latifa BegumAbstract:Abstract A 3-D numerical simulation of an industrial-sized slab caster for magnesium alloy AZ91 has been carried out for the steady state operational phase of the caster. The simulated model consists of an open-top Melt Delivery System fitted with a porous filter near the hot-top. The Melt flow through the porous filter was modeled on the basis of Brinkmann-Forchimier-Extended non-Darcy model for turbulent flow. An in-house 3-D CFD code was modified to account for the Melt flow through the porous filter. Results are obtained for four casting speeds namely, 40, 60, 80, and 100 mm/min. The metal-mold contact region as well as the convective heat transfer coefficient at the mold wall were also varied. In addition to the above, the Darcy number for the porous media was also changed. All parametric studies were performed for a fixed inlet Melt superheat of 64 °C. The results are presented pictorially in the form of temperature and velocity fields. The sump depth, mushy region thickness, solid shell thickness at the exit of the mold and axial temperature profiles are also presented and correlated with the casting speed through regression analysis.
Wanda Robertson - One of the best experts on this subject based on the ideXlab platform.
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mid atlantic ridge volcanism from deep towed side scan sonar images 25 29 n
Journal of Volcanology and Geothermal Research, 1995Co-Authors: Deborah K Smith, Joe Cann, Martin E Dougherty, Sara Spencer, C J Macleod, J A Keeton, E Mcallister, Benjamin A Brooks, Rachel Pascoe, Wanda RobertsonAbstract:Abstract We present deep-towed side-scan sonar mosaics of the inner valley floor of eight spreading segments at the slow-spreading Mid-Atlantic Ridge between 25 ° and 29 °N. An analysis of these images, which well-resolve features a few tens of meters in size, confirms that the multitude of small seamounts, with diameters between 0.5 and 3 km identified on the inner valley floor from previously collected multibeam bathymetry data, are volcanically constructed. Moreover, these images reveal that these volcanoes have distinct surface morphologies not evident in the coarser resolution multibeam bathymetry maps: 83% of the seamounts have a hummocky (bulbous) morphology; the other 17% have a smooth morphology. In addition to near-circular seamounts, small (1–2 km long) volcanic ridges are abundant in our study regions, and are not, in general, seen in the bathymetry maps. We combine these new morphological data with existing models for the construction of the shallow oceanic crust to obtain a better understanding of the Melt Delivery System that builds the distinctive seafloor topography at the slow-spreading Mid-Atlantic Ridge.
Deborah K Smith - One of the best experts on this subject based on the ideXlab platform.
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mid atlantic ridge volcanism from deep towed side scan sonar images 25 29 n
Journal of Volcanology and Geothermal Research, 1995Co-Authors: Deborah K Smith, Joe Cann, Martin E Dougherty, Sara Spencer, C J Macleod, J A Keeton, E Mcallister, Benjamin A Brooks, Rachel Pascoe, Wanda RobertsonAbstract:Abstract We present deep-towed side-scan sonar mosaics of the inner valley floor of eight spreading segments at the slow-spreading Mid-Atlantic Ridge between 25 ° and 29 °N. An analysis of these images, which well-resolve features a few tens of meters in size, confirms that the multitude of small seamounts, with diameters between 0.5 and 3 km identified on the inner valley floor from previously collected multibeam bathymetry data, are volcanically constructed. Moreover, these images reveal that these volcanoes have distinct surface morphologies not evident in the coarser resolution multibeam bathymetry maps: 83% of the seamounts have a hummocky (bulbous) morphology; the other 17% have a smooth morphology. In addition to near-circular seamounts, small (1–2 km long) volcanic ridges are abundant in our study regions, and are not, in general, seen in the bathymetry maps. We combine these new morphological data with existing models for the construction of the shallow oceanic crust to obtain a better understanding of the Melt Delivery System that builds the distinctive seafloor topography at the slow-spreading Mid-Atlantic Ridge.
Joe Cann - One of the best experts on this subject based on the ideXlab platform.
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mid atlantic ridge volcanism from deep towed side scan sonar images 25 29 n
Journal of Volcanology and Geothermal Research, 1995Co-Authors: Deborah K Smith, Joe Cann, Martin E Dougherty, Sara Spencer, C J Macleod, J A Keeton, E Mcallister, Benjamin A Brooks, Rachel Pascoe, Wanda RobertsonAbstract:Abstract We present deep-towed side-scan sonar mosaics of the inner valley floor of eight spreading segments at the slow-spreading Mid-Atlantic Ridge between 25 ° and 29 °N. An analysis of these images, which well-resolve features a few tens of meters in size, confirms that the multitude of small seamounts, with diameters between 0.5 and 3 km identified on the inner valley floor from previously collected multibeam bathymetry data, are volcanically constructed. Moreover, these images reveal that these volcanoes have distinct surface morphologies not evident in the coarser resolution multibeam bathymetry maps: 83% of the seamounts have a hummocky (bulbous) morphology; the other 17% have a smooth morphology. In addition to near-circular seamounts, small (1–2 km long) volcanic ridges are abundant in our study regions, and are not, in general, seen in the bathymetry maps. We combine these new morphological data with existing models for the construction of the shallow oceanic crust to obtain a better understanding of the Melt Delivery System that builds the distinctive seafloor topography at the slow-spreading Mid-Atlantic Ridge.