Matthew Hyre - Academia.edu (original) (raw)
Papers by Matthew Hyre
Ecology and the Environment, Jun 11, 2012
Restenosis remains a significant problem in coronary intervention. Additionally, concerns have re... more Restenosis remains a significant problem in coronary intervention. Additionally, concerns have recently been raised that Drug Eluting Stents (DES) are linked to long term thrombosis. For carotid artery stenting, the most serious complication is ipsilateral neurologic events due to an acute embolus from fragmentation of the lesion during stent deployment. While much attention has focused on biocompatibility solutions to these problems, less attention has been given to matching stents to the inflation balloon, atherosclerotic plaque mechanical properties, and lesion shape. Results show that risk of arterial damage or plaque fractures are dependent on plaque morphology and material properties. Computational modeling results also indicate that it may be possible to use numerical simulations to estimate stress distributions in atherosclerotic lesions in vivo during and after stent deployment. This may help provide clinical indicators in stenting to reduce vascular injury and plaque rupture which can cause acute and long term postprocedural lumen loss in coronary artery stenting or stroke in carotid artery stenting. Results also indicate that while a complex model for plaque morphology is necessary to determine the stress distribution within the lesion, a more simple homogeneous plaque model will allow for reasonably accurate predictions of arterial stresses.
Copper oxide is one of several metal oxides which exhibit flue gas desulfurization capability; a ... more Copper oxide is one of several metal oxides which exhibit flue gas desulfurization capability; a key advantage of copper oxide is that both adsorption and regeneration take place at similar temperatures and that this temperature ({approximately}700 F) places the process in an ideal location at the exit of the boiler economizer. In the COBRA (Copper Oxide Bed Regenerative Adsorber) Process sulfur laden flue gas is contacted with copper oxide impregnated alumina oxide substrate in a moving bed reactor. In the moving bed the flue gas, in crossflow, contacts the downward moving sorbent forming copper sulfate. Vertical retention screens are used to physically contain the sorbent in the bed, but let gas flow horizontally through the bed of packed spheres. The sulfated sorbent is transported from the bottom of the moving bed reactors to the regenerator vessels without the need for additional heating or cooling. In the regenerators, methane or another reducing agent is used to reduce the co...
… of the 14th …, 1997
Laboratory-scale cold fluidized beds have been used extensively to study fluidized bed hydrodynam... more Laboratory-scale cold fluidized beds have been used extensively to study fluidized bed hydrodynamics. Previously, it has been shown that laboratory-scale cold models can be used to simulate the hydrodynamics of a hot fluidized bed combustor when a set of dimensionless scaling laws is matched between the two beds. These scaling laws have been verified by numerous researchers in both atmospheric bubbling and atmospheric circulating fluidized beds. A recent study at the Massachusetts Institute of Technology (MIT) demonstrated that it is possible to relax some of the scaling relationships, producing a simplified set of scaling laws. The advantage of the simplified set of scaling parameters over the full set is the increased flexibility in the design of a model to simulate a combustor or chemical reactor. With the full set of scaling parameters, a scale model fluidized bed with air at ambient conditions is constrained to a single set of operating and geometric conditions. A cold model of an atmospheric combustor has linear dimensions approximately one-quarter those of the combustor. A cold model of a pressurized combustor has linear dimensions which are 20% larger than those of the combustor. Use of the simplified set of parameters allows the cold model tomore » have much smaller linear dimensions than the combustor. In the present study, the simplified set of scaling laws are applied to a Foster Wheeler 33 cm diameter, 11.5 m high circulating fluidized bed combustor pressurized to 7.5 bar. A 1/6.5 scale model of the hot pressurized circulating fluidized bed, constructed and operated by Foster Wheeler Development Corp., has been constructed. Recently completed validation tests included comparisons of the vertical solids distribution along with the probability density functions and power spectral densities of the pressure fluctuations within the beds. The data suggest good agreement when the simplified scaling parameters are held constant between the hot combustor and cold model.« less
International Journal of Applied Glass Science, May 20, 2010
The bubbles generated by argon blowing in a nozzle have important effects on the flow and heat tr... more The bubbles generated by argon blowing in a nozzle have important effects on the flow and heat transfer behavior of mold slag. To determine the effect of argon blowing on the flow and heat transfer behavior of liquid slag in the mold, we developed three-dimensional mathematical models coupled the volume of fluid and discrete phase models. The results showed a small circulation flow of liquid mold slag occurred near the nozzle side face and the mold narrow face respectively at the center plane between the mold wide faces. Additionally, we identified a larger circulation of liquid mold slag in the middle region of the mold. With increased argon flow rate, the flow velocity peak at the liquid steel and slag interface decreased, the temperature of the liquid mold slag increased. A moderate flow rate of argon improved the uniformity of flow velocity and temperature distribution of liquid slag and reduced the flow velocity peak at the interface of the liquid steel and slag. To avoid the solidification of liquid steel at the steel-slag interface near the mold face, moderately high casting speed and argon flow rate and larger inclination angle and immersion depth of the submerged entry nozzle may be beneficial. These results provide a theoretical basis to optimize the parameters of the argon blowing process and improve slab quality.
The International Journal of Advanced Manufacturing Technology
Blow and blow forming process for glass bottle is already validated for 2D axisymmetrical bottles... more Blow and blow forming process for glass bottle is already validated for 2D axisymmetrical bottles. Current research evaluates the capabilities of the 3D simulations with more complex geometries. This article presents the results of a numerical and experimental study of a non-axisymmetrical glass bottle. In this study, a perfume bottle with a square-based prism geometry and a new set of industrial process conditions have been evaluated. To validate the numerical results, the predicted temperatures in the glass domain have been correlated with experimental infrared measurements of the glass at various stages of the forming process. A comparison of the predicted glass thickness distributions with the section profiles obtained from the manufactured glass bottles is also provided. Finally, transition from the 2 Da to 3D model resulted in new difficulties and capabilities that are also discussed. This study validates simulations with experimental results to help in the design process of m...
In the glass container industry, two processes of forming small finished containers currently dom... more In the glass container industry, two processes of forming small finished containers currently dominate: the Narrow Neck Press and Blow (NNPB) and the Blow and Blow (B&B) forming processes. In the NNPB process, pressing forms the glass container parison. Alternatively, in the B&B process the parison is blown. For most containers, the blank mould cooling strategy has been developed independent of the forming process. There are currently three primary blank cooling methodologies. In the most common system, the cooling air is blown horizontally across the blank moulds. Other cooling configurations use air flowing through vertically drilled holes in the mould. THE EXPERT
arge deviations from the ideal gob shape and trajectory can have severe consequences on the penet... more arge deviations from the ideal gob shape and trajectory can have severe consequences on the penetration of the glass into the transfer equipment and moulds. Additionally, asymmetric loading of the gob into the blank moulds can cause uneven temperature and wear patterns on the mould interiors. In order to investigate how various forehearth performance affects gob shape and weight, a numerical study was performed. The numerical simulation modelled flow of glass through the forehearth, the formation of the gob at the feeder, and the subsequent formation of THE EXPERT
Emhart Glass believes that a better understanding of the factors influencing the flow and heat tr... more Emhart Glass believes that a better understanding of the factors influencing the flow and heat transfer in forehearths can assist in improving the performance of existing installations and is important in any consideration of new and improved designs, as this article explains.
2007 Annual Conference & Exposition Proceedings
United States Military Academy in West Point, NY and served in the army as a Military Intelligenc... more United States Military Academy in West Point, NY and served in the army as a Military Intelligence officer during Desert Storm. Although his PhD is in electrical engineering, he completed his doctoral work in a biomedical engineering laboratory at MIT and has interests in analog and digital instrumentation, signal processing, biomechanics, patent litigation, and cardiology. At VMI he teaches analog circuitry, continuous time and discrete time signal processing, and advises a variety of independent study projects.
2004 Annual Conference Proceedings
Independent research and design is a critical component of engineering education, yet undergradua... more Independent research and design is a critical component of engineering education, yet undergraduates often have few opportunities to showcase their work. It can also be difficult to convey their experiences succinctly on a resume unless they publish or present their design. In order to provide a forum to communicate and celebrate undergraduate student achievement, many universities have created undergraduate research conferences. The primary goal of these conferences is the promotion of undergraduate research, scholarship, and creative activity performed in partnership with faculty or other mentors. A secondary goal is to help faculty discover new and more sophisticated ways to incorporate undergraduates in research and to encourage students to undertake research projects of their own. In this paper we describe how to create and direct a first-time undergraduate research conference. Specifically we examine the steps of planning, budgeting, forming and managing the necessary subcommittees, raising interest among potential presenters and attendees, managing abstract submissions, and orchestration of the conference event itself. We also describe some of the pitfalls that can occur to first-time conference organizers, their solutions, and how to use the existing infrastructure of the school to reduce staffing requirements.
International Journal of Applied Glass Science
Glass International, 2009
Matthew Hyre * of Emhart Glass Research Centre in the USA reports on a study to understand the ro... more Matthew Hyre * of Emhart Glass Research Centre in the USA reports on a study to understand the root causes of many forming defects, using computational techniques to virtually form containers.
AIP Conference Proceedings, 2004
ABSTRACT
Ecology and the Environment, Jun 11, 2012
Restenosis remains a significant problem in coronary intervention. Additionally, concerns have re... more Restenosis remains a significant problem in coronary intervention. Additionally, concerns have recently been raised that Drug Eluting Stents (DES) are linked to long term thrombosis. For carotid artery stenting, the most serious complication is ipsilateral neurologic events due to an acute embolus from fragmentation of the lesion during stent deployment. While much attention has focused on biocompatibility solutions to these problems, less attention has been given to matching stents to the inflation balloon, atherosclerotic plaque mechanical properties, and lesion shape. Results show that risk of arterial damage or plaque fractures are dependent on plaque morphology and material properties. Computational modeling results also indicate that it may be possible to use numerical simulations to estimate stress distributions in atherosclerotic lesions in vivo during and after stent deployment. This may help provide clinical indicators in stenting to reduce vascular injury and plaque rupture which can cause acute and long term postprocedural lumen loss in coronary artery stenting or stroke in carotid artery stenting. Results also indicate that while a complex model for plaque morphology is necessary to determine the stress distribution within the lesion, a more simple homogeneous plaque model will allow for reasonably accurate predictions of arterial stresses.
Copper oxide is one of several metal oxides which exhibit flue gas desulfurization capability; a ... more Copper oxide is one of several metal oxides which exhibit flue gas desulfurization capability; a key advantage of copper oxide is that both adsorption and regeneration take place at similar temperatures and that this temperature ({approximately}700 F) places the process in an ideal location at the exit of the boiler economizer. In the COBRA (Copper Oxide Bed Regenerative Adsorber) Process sulfur laden flue gas is contacted with copper oxide impregnated alumina oxide substrate in a moving bed reactor. In the moving bed the flue gas, in crossflow, contacts the downward moving sorbent forming copper sulfate. Vertical retention screens are used to physically contain the sorbent in the bed, but let gas flow horizontally through the bed of packed spheres. The sulfated sorbent is transported from the bottom of the moving bed reactors to the regenerator vessels without the need for additional heating or cooling. In the regenerators, methane or another reducing agent is used to reduce the co...
… of the 14th …, 1997
Laboratory-scale cold fluidized beds have been used extensively to study fluidized bed hydrodynam... more Laboratory-scale cold fluidized beds have been used extensively to study fluidized bed hydrodynamics. Previously, it has been shown that laboratory-scale cold models can be used to simulate the hydrodynamics of a hot fluidized bed combustor when a set of dimensionless scaling laws is matched between the two beds. These scaling laws have been verified by numerous researchers in both atmospheric bubbling and atmospheric circulating fluidized beds. A recent study at the Massachusetts Institute of Technology (MIT) demonstrated that it is possible to relax some of the scaling relationships, producing a simplified set of scaling laws. The advantage of the simplified set of scaling parameters over the full set is the increased flexibility in the design of a model to simulate a combustor or chemical reactor. With the full set of scaling parameters, a scale model fluidized bed with air at ambient conditions is constrained to a single set of operating and geometric conditions. A cold model of an atmospheric combustor has linear dimensions approximately one-quarter those of the combustor. A cold model of a pressurized combustor has linear dimensions which are 20% larger than those of the combustor. Use of the simplified set of parameters allows the cold model tomore » have much smaller linear dimensions than the combustor. In the present study, the simplified set of scaling laws are applied to a Foster Wheeler 33 cm diameter, 11.5 m high circulating fluidized bed combustor pressurized to 7.5 bar. A 1/6.5 scale model of the hot pressurized circulating fluidized bed, constructed and operated by Foster Wheeler Development Corp., has been constructed. Recently completed validation tests included comparisons of the vertical solids distribution along with the probability density functions and power spectral densities of the pressure fluctuations within the beds. The data suggest good agreement when the simplified scaling parameters are held constant between the hot combustor and cold model.« less
International Journal of Applied Glass Science, May 20, 2010
The bubbles generated by argon blowing in a nozzle have important effects on the flow and heat tr... more The bubbles generated by argon blowing in a nozzle have important effects on the flow and heat transfer behavior of mold slag. To determine the effect of argon blowing on the flow and heat transfer behavior of liquid slag in the mold, we developed three-dimensional mathematical models coupled the volume of fluid and discrete phase models. The results showed a small circulation flow of liquid mold slag occurred near the nozzle side face and the mold narrow face respectively at the center plane between the mold wide faces. Additionally, we identified a larger circulation of liquid mold slag in the middle region of the mold. With increased argon flow rate, the flow velocity peak at the liquid steel and slag interface decreased, the temperature of the liquid mold slag increased. A moderate flow rate of argon improved the uniformity of flow velocity and temperature distribution of liquid slag and reduced the flow velocity peak at the interface of the liquid steel and slag. To avoid the solidification of liquid steel at the steel-slag interface near the mold face, moderately high casting speed and argon flow rate and larger inclination angle and immersion depth of the submerged entry nozzle may be beneficial. These results provide a theoretical basis to optimize the parameters of the argon blowing process and improve slab quality.
The International Journal of Advanced Manufacturing Technology
Blow and blow forming process for glass bottle is already validated for 2D axisymmetrical bottles... more Blow and blow forming process for glass bottle is already validated for 2D axisymmetrical bottles. Current research evaluates the capabilities of the 3D simulations with more complex geometries. This article presents the results of a numerical and experimental study of a non-axisymmetrical glass bottle. In this study, a perfume bottle with a square-based prism geometry and a new set of industrial process conditions have been evaluated. To validate the numerical results, the predicted temperatures in the glass domain have been correlated with experimental infrared measurements of the glass at various stages of the forming process. A comparison of the predicted glass thickness distributions with the section profiles obtained from the manufactured glass bottles is also provided. Finally, transition from the 2 Da to 3D model resulted in new difficulties and capabilities that are also discussed. This study validates simulations with experimental results to help in the design process of m...
In the glass container industry, two processes of forming small finished containers currently dom... more In the glass container industry, two processes of forming small finished containers currently dominate: the Narrow Neck Press and Blow (NNPB) and the Blow and Blow (B&B) forming processes. In the NNPB process, pressing forms the glass container parison. Alternatively, in the B&B process the parison is blown. For most containers, the blank mould cooling strategy has been developed independent of the forming process. There are currently three primary blank cooling methodologies. In the most common system, the cooling air is blown horizontally across the blank moulds. Other cooling configurations use air flowing through vertically drilled holes in the mould. THE EXPERT
arge deviations from the ideal gob shape and trajectory can have severe consequences on the penet... more arge deviations from the ideal gob shape and trajectory can have severe consequences on the penetration of the glass into the transfer equipment and moulds. Additionally, asymmetric loading of the gob into the blank moulds can cause uneven temperature and wear patterns on the mould interiors. In order to investigate how various forehearth performance affects gob shape and weight, a numerical study was performed. The numerical simulation modelled flow of glass through the forehearth, the formation of the gob at the feeder, and the subsequent formation of THE EXPERT
Emhart Glass believes that a better understanding of the factors influencing the flow and heat tr... more Emhart Glass believes that a better understanding of the factors influencing the flow and heat transfer in forehearths can assist in improving the performance of existing installations and is important in any consideration of new and improved designs, as this article explains.
2007 Annual Conference & Exposition Proceedings
United States Military Academy in West Point, NY and served in the army as a Military Intelligenc... more United States Military Academy in West Point, NY and served in the army as a Military Intelligence officer during Desert Storm. Although his PhD is in electrical engineering, he completed his doctoral work in a biomedical engineering laboratory at MIT and has interests in analog and digital instrumentation, signal processing, biomechanics, patent litigation, and cardiology. At VMI he teaches analog circuitry, continuous time and discrete time signal processing, and advises a variety of independent study projects.
2004 Annual Conference Proceedings
Independent research and design is a critical component of engineering education, yet undergradua... more Independent research and design is a critical component of engineering education, yet undergraduates often have few opportunities to showcase their work. It can also be difficult to convey their experiences succinctly on a resume unless they publish or present their design. In order to provide a forum to communicate and celebrate undergraduate student achievement, many universities have created undergraduate research conferences. The primary goal of these conferences is the promotion of undergraduate research, scholarship, and creative activity performed in partnership with faculty or other mentors. A secondary goal is to help faculty discover new and more sophisticated ways to incorporate undergraduates in research and to encourage students to undertake research projects of their own. In this paper we describe how to create and direct a first-time undergraduate research conference. Specifically we examine the steps of planning, budgeting, forming and managing the necessary subcommittees, raising interest among potential presenters and attendees, managing abstract submissions, and orchestration of the conference event itself. We also describe some of the pitfalls that can occur to first-time conference organizers, their solutions, and how to use the existing infrastructure of the school to reduce staffing requirements.
International Journal of Applied Glass Science
Glass International, 2009
Matthew Hyre * of Emhart Glass Research Centre in the USA reports on a study to understand the ro... more Matthew Hyre * of Emhart Glass Research Centre in the USA reports on a study to understand the root causes of many forming defects, using computational techniques to virtually form containers.
AIP Conference Proceedings, 2004
ABSTRACT