The Experts below are selected from a list of 6327 Experts worldwide ranked by ideXlab platform
Heekoo Moon - One of the best experts on this subject based on the ideXlab platform.
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crossflows from jet array impingement cooling hole spacing Target Plate distance reynolds number effects
International Journal of Thermal Sciences, 2015Co-Authors: P M Ligrani, Heekoo MoonAbstract:Abstract Data which illustrate the combined and separate effects of hole array spacing, jet-to-Target Plate distance, and Reynolds number on cross-flows , and the resulting heat transfer, for an impingement jet array are presented. The array of impinging jets are directed to one flat surface of a channel which is bounded on three sides. Considered are Reynolds numbers ranging from 8000 to 50,000, jet-to-Target Plate distances of 1.5 D , 3.0 D , 5.0 D , and 8.0 D , and steamwise and spanwise hole spacing of 5 D , 8 D , and 12 D , where D is the impingement hole diameter. In general, the cumulative accumulations of cross-flows, from sequential rows of jets, reduce the effectiveness of each individual jet (especially for jets at larger streamwise locations). In other situations, the impingement cross-flow results in locally augmented Nusselt numbers. Such variations most often occur at larger downstream locations, as jet interactions are more vigorous, and local magnitudes of mixing and turbulent transport are augmented. This occurs in channels at lower Reynolds numbers, where impingement jets are confined by smaller hole spacing, and smaller jet-to-Target Plate distance. The overall result is complex dependence of local, line-averaged, and spatially-averaged Nusselt numbers on hole array spacing, jet-to-Target Plate distance, and impingement jet Reynolds number.
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cross flow effects on impingement array heat transfer with varying jet to Target Plate distance and hole spacing
International Journal of Heat and Mass Transfer, 2014Co-Authors: P M Ligrani, Heekoo MoonAbstract:Abstract New impingement heat transfer data are presented for experimental conditions and configurations employed have not been previously examined, which illustrate the effects of impingement cross-flows on local, line-averaged, and spatially-averaged Nusselt numbers, as both jet-to-Target distance and jet hole spacing are altered. Data are given for a constant impingement jet Reynolds number of 8000. In general, the impingement passage cross-flows which accumulate are detrimental to local Nusselt number performance, especially for denser hole arrays with 5 D and 8 D hole spacing, where D is impingement hole diameter. This is illustrated by periodic variations of surface Nusselt numbers, which generally decrease with streamwise development, and by local Nusselt number peak values for hole spacings of 5 D , 8 D , and 12 D which generally become smaller at successive x/D locations for each value of Z/D . Also considered are unique situations where significant accumulation of cross-flow fluid results in an opposite trend, with local Nusselt numbers which increase with streamwise development for dense hole spacing of 5 D , and smaller jet-to-Target Plate distances of 1.5 D and 3.0 D .
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Crossflows From Jet Array Impingement Cooling: Effects of Hole Array Spacing, Jet-to-Target Plate Distance, and Reynolds Number
Volume 5A: Heat Transfer, 2014Co-Authors: P M Ligrani, Heekoo MoonAbstract:Data which illustrate the combined and separate effects of hole array spacing, jet-to-Target Plate distance, and Reynolds number on cross-flows, and the resulting heat transfer, for an impingement jet array are presented. The array of impinging jets are directed to one flat surface of a channel which is bounded on three sides. Considered are Reynolds numbers ranging from 8,000 to 50,000, jet-to-Target Plate distances of 1.5D, 3.0D, 5.0D, and 8.0D, and steamwise and spanwise hole spacing of 5D, 8D, and 12D, where D is the impingement hole diameter. In general, the cumulative accumulations of cross-flows, from sequential rows of jets, reduce the effectiveness of each individual jet (especially for jets at larger streamwise locations). The result is sequentially decreasing periodic Nusselt number variations with streamwise development, which generally become more significant as the Reynolds number increases, and as hole spacing decreases. In other situations, the impingement cross-flow results in locally augmented Nusselt numbers. Such variations most often occur at larger downstream locations, as jet interactions are more vigorous, and local magnitudes of mixing and turbulent transport are augmented. This occurs in channels at lower Reynolds numbers, where impingement jets are confined by smaller hole spacing, and smaller jet-to-Target Plate distance. The overall result is complex dependence of local, line-averaged, and spatially-averaged Nusselt numbers on hole array spacing, jet-to-Target Plate distance, and impingement jet Reynolds number. Of particular importance are the effects of these parameters on the coherence of the shear layers which form around the impingement jets, as well as on the Kelvin-Helmholtz instability vortices which develop within the shear interface around each impingement jet.Copyright © 2014 by ASME
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effects of jet to Target Plate distance and reynolds number on jet array impingement heat transfer
ASME Turbo Expo 2013: Turbine Technical Conference and Exposition, 2013Co-Authors: Jacob Haegele, P M Ligrani, Geoffrey Potts, Heekoo MoonAbstract:Data which illustrate the effects of jet-to-Target Plate distance and Reynolds number on the heat transfer from an array of jets impinging on a flat Plate are presented. Considered are Reynolds numbers Rej ranging from 8,200, to 52,000, with isentropic jet Mach numbers of approximately 0.1 to 0.2. Jet-to-Target Plate distances Z of 1.5D, 3.0D, 5.0D, and 8.0D are employed, where D is the impingement hole diameter. Steamwise and spanwise hole spacings are 8D. Local and spatially-averaged Nusselt numbers show strong dependence on the impingement jet Reynolds number for all situations examined. Experimental results also illustrate the dependence of local Nusselt numbers on normalized jet-to-Target Plate distance, especially for smaller values of this quantity. The observed variations are partially due to accumulating cross-flows produced as the jets advect downstream, as well as the interactions of the vortex structures which initially form around the jets, and then impact and interact as they advect away from stagnation points along the impingement Target surface. The highest spatially-averaged Nusselt numbers are present for Z/D = 3.0 for Rej of 8,200, 20,900, and 30,000. When Rej = 52,000, spatially-averaged Nusselt numbers increase as Z/D decreases, with the highest value present at Z/D = 1.5.Copyright © 2013 by ASME
Hubert H Girault - One of the best experts on this subject based on the ideXlab platform.
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TiO2 Printed Aluminum Foil: Single-Use Film for a Laser Desorption/Ionization Target Plate
Analytical Chemistry, 2009Co-Authors: Hongyan Bi, Liang Qiao, Jeanmarc Busnel, Valerie Devaud, Hubert H GiraultAbstract:Single-use aluminum foil-based laser desorption/ionization (LDI) Target Plates have been developed for mass spectrometry (MS) analysis and provide detection results comparable to those of commercial stainless steel Plates while offering a convenient way to avoid the time-consuming surface cleaning process. Additionally, arrays of TiO2 nanoparticle spots are coated on the foil either by screen-printing or rotogravure-printing followed by sintering to form a mesoporous layer spot to act as an anchor for sample deposition. These TiO2 spots offer further functions to the Al foil, such as matrix-free laser desorption/ionization or specific affinity for in situ enrichment of phosphopeptides. The single-use TiO2−Al foils are cheap to produce, easy to use, and well suited for high-throughput proteomics research. They can also be of interest for protein post-translational modifications study.
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tio2 printed aluminum foil single use film for a laser desorption ionization Target Plate
Analytical Chemistry, 2009Co-Authors: Hongyan Bi, Liang Qiao, Jeanmarc Busnel, Valerie Devaud, Hubert H GiraultAbstract:Single-use aluminum foil-based laser desorption/ionization (LDI) Target Plates have been developed for mass spectrometry (MS) analysis and provide detection results comparable to those of commercial stainless steel Plates while offering a convenient way to avoid the time-consuming surface cleaning process. Additionally, arrays of TiO2 nanoparticle spots are coated on the foil either by screen-printing or rotogravure-printing followed by sintering to form a mesoporous layer spot to act as an anchor for sample deposition. These TiO2 spots offer further functions to the Al foil, such as matrix-free laser desorption/ionization or specific affinity for in situ enrichment of phosphopeptides. The single-use TiO2−Al foils are cheap to produce, easy to use, and well suited for high-throughput proteomics research. They can also be of interest for protein post-translational modifications study.
P M Ligrani - One of the best experts on this subject based on the ideXlab platform.
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crossflows from jet array impingement cooling hole spacing Target Plate distance reynolds number effects
International Journal of Thermal Sciences, 2015Co-Authors: P M Ligrani, Heekoo MoonAbstract:Abstract Data which illustrate the combined and separate effects of hole array spacing, jet-to-Target Plate distance, and Reynolds number on cross-flows , and the resulting heat transfer, for an impingement jet array are presented. The array of impinging jets are directed to one flat surface of a channel which is bounded on three sides. Considered are Reynolds numbers ranging from 8000 to 50,000, jet-to-Target Plate distances of 1.5 D , 3.0 D , 5.0 D , and 8.0 D , and steamwise and spanwise hole spacing of 5 D , 8 D , and 12 D , where D is the impingement hole diameter. In general, the cumulative accumulations of cross-flows, from sequential rows of jets, reduce the effectiveness of each individual jet (especially for jets at larger streamwise locations). In other situations, the impingement cross-flow results in locally augmented Nusselt numbers. Such variations most often occur at larger downstream locations, as jet interactions are more vigorous, and local magnitudes of mixing and turbulent transport are augmented. This occurs in channels at lower Reynolds numbers, where impingement jets are confined by smaller hole spacing, and smaller jet-to-Target Plate distance. The overall result is complex dependence of local, line-averaged, and spatially-averaged Nusselt numbers on hole array spacing, jet-to-Target Plate distance, and impingement jet Reynolds number.
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cross flow effects on impingement array heat transfer with varying jet to Target Plate distance and hole spacing
International Journal of Heat and Mass Transfer, 2014Co-Authors: P M Ligrani, Heekoo MoonAbstract:Abstract New impingement heat transfer data are presented for experimental conditions and configurations employed have not been previously examined, which illustrate the effects of impingement cross-flows on local, line-averaged, and spatially-averaged Nusselt numbers, as both jet-to-Target distance and jet hole spacing are altered. Data are given for a constant impingement jet Reynolds number of 8000. In general, the impingement passage cross-flows which accumulate are detrimental to local Nusselt number performance, especially for denser hole arrays with 5 D and 8 D hole spacing, where D is impingement hole diameter. This is illustrated by periodic variations of surface Nusselt numbers, which generally decrease with streamwise development, and by local Nusselt number peak values for hole spacings of 5 D , 8 D , and 12 D which generally become smaller at successive x/D locations for each value of Z/D . Also considered are unique situations where significant accumulation of cross-flow fluid results in an opposite trend, with local Nusselt numbers which increase with streamwise development for dense hole spacing of 5 D , and smaller jet-to-Target Plate distances of 1.5 D and 3.0 D .
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Crossflows From Jet Array Impingement Cooling: Effects of Hole Array Spacing, Jet-to-Target Plate Distance, and Reynolds Number
Volume 5A: Heat Transfer, 2014Co-Authors: P M Ligrani, Heekoo MoonAbstract:Data which illustrate the combined and separate effects of hole array spacing, jet-to-Target Plate distance, and Reynolds number on cross-flows, and the resulting heat transfer, for an impingement jet array are presented. The array of impinging jets are directed to one flat surface of a channel which is bounded on three sides. Considered are Reynolds numbers ranging from 8,000 to 50,000, jet-to-Target Plate distances of 1.5D, 3.0D, 5.0D, and 8.0D, and steamwise and spanwise hole spacing of 5D, 8D, and 12D, where D is the impingement hole diameter. In general, the cumulative accumulations of cross-flows, from sequential rows of jets, reduce the effectiveness of each individual jet (especially for jets at larger streamwise locations). The result is sequentially decreasing periodic Nusselt number variations with streamwise development, which generally become more significant as the Reynolds number increases, and as hole spacing decreases. In other situations, the impingement cross-flow results in locally augmented Nusselt numbers. Such variations most often occur at larger downstream locations, as jet interactions are more vigorous, and local magnitudes of mixing and turbulent transport are augmented. This occurs in channels at lower Reynolds numbers, where impingement jets are confined by smaller hole spacing, and smaller jet-to-Target Plate distance. The overall result is complex dependence of local, line-averaged, and spatially-averaged Nusselt numbers on hole array spacing, jet-to-Target Plate distance, and impingement jet Reynolds number. Of particular importance are the effects of these parameters on the coherence of the shear layers which form around the impingement jets, as well as on the Kelvin-Helmholtz instability vortices which develop within the shear interface around each impingement jet.Copyright © 2014 by ASME
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effects of jet to Target Plate distance and reynolds number on jet array impingement heat transfer
ASME Turbo Expo 2013: Turbine Technical Conference and Exposition, 2013Co-Authors: Jacob Haegele, P M Ligrani, Geoffrey Potts, Heekoo MoonAbstract:Data which illustrate the effects of jet-to-Target Plate distance and Reynolds number on the heat transfer from an array of jets impinging on a flat Plate are presented. Considered are Reynolds numbers Rej ranging from 8,200, to 52,000, with isentropic jet Mach numbers of approximately 0.1 to 0.2. Jet-to-Target Plate distances Z of 1.5D, 3.0D, 5.0D, and 8.0D are employed, where D is the impingement hole diameter. Steamwise and spanwise hole spacings are 8D. Local and spatially-averaged Nusselt numbers show strong dependence on the impingement jet Reynolds number for all situations examined. Experimental results also illustrate the dependence of local Nusselt numbers on normalized jet-to-Target Plate distance, especially for smaller values of this quantity. The observed variations are partially due to accumulating cross-flows produced as the jets advect downstream, as well as the interactions of the vortex structures which initially form around the jets, and then impact and interact as they advect away from stagnation points along the impingement Target surface. The highest spatially-averaged Nusselt numbers are present for Z/D = 3.0 for Rej of 8,200, 20,900, and 30,000. When Rej = 52,000, spatially-averaged Nusselt numbers increase as Z/D decreases, with the highest value present at Z/D = 1.5.Copyright © 2013 by ASME
Hongyan Bi - One of the best experts on this subject based on the ideXlab platform.
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TiO2 Printed Aluminum Foil: Single-Use Film for a Laser Desorption/Ionization Target Plate
Analytical Chemistry, 2009Co-Authors: Hongyan Bi, Liang Qiao, Jeanmarc Busnel, Valerie Devaud, Hubert H GiraultAbstract:Single-use aluminum foil-based laser desorption/ionization (LDI) Target Plates have been developed for mass spectrometry (MS) analysis and provide detection results comparable to those of commercial stainless steel Plates while offering a convenient way to avoid the time-consuming surface cleaning process. Additionally, arrays of TiO2 nanoparticle spots are coated on the foil either by screen-printing or rotogravure-printing followed by sintering to form a mesoporous layer spot to act as an anchor for sample deposition. These TiO2 spots offer further functions to the Al foil, such as matrix-free laser desorption/ionization or specific affinity for in situ enrichment of phosphopeptides. The single-use TiO2−Al foils are cheap to produce, easy to use, and well suited for high-throughput proteomics research. They can also be of interest for protein post-translational modifications study.
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tio2 printed aluminum foil single use film for a laser desorption ionization Target Plate
Analytical Chemistry, 2009Co-Authors: Hongyan Bi, Liang Qiao, Jeanmarc Busnel, Valerie Devaud, Hubert H GiraultAbstract:Single-use aluminum foil-based laser desorption/ionization (LDI) Target Plates have been developed for mass spectrometry (MS) analysis and provide detection results comparable to those of commercial stainless steel Plates while offering a convenient way to avoid the time-consuming surface cleaning process. Additionally, arrays of TiO2 nanoparticle spots are coated on the foil either by screen-printing or rotogravure-printing followed by sintering to form a mesoporous layer spot to act as an anchor for sample deposition. These TiO2 spots offer further functions to the Al foil, such as matrix-free laser desorption/ionization or specific affinity for in situ enrichment of phosphopeptides. The single-use TiO2−Al foils are cheap to produce, easy to use, and well suited for high-throughput proteomics research. They can also be of interest for protein post-translational modifications study.
Christine Enjalbal - One of the best experts on this subject based on the ideXlab platform.
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silica nanoparticles pre spotted onto Target Plate for laser desorption ionization mass spectrometry analyses of peptides
Analytica Chimica Acta, 2012Co-Authors: Mathieu Dupre, Sonia Cantel, Jeanolivier Durand, Jean Martinez, Christine EnjalbalAbstract:Abstract We report on the simple deposition of Stober silica nanoparticles (SiO 2 NPs) on conventional MALDI Target Plate for high throughput laser desorption/ionization mass spectrometry (LDI-MS) analyses of peptide mixtures with sensitivity in the femtomolar range. This low-cost easily prepared material allowed straightforward LDI experiments by deposition of the studied samples directly onto a pre-spotted MALDI Plate. This analytical strategy can be performed in any laboratory equipped with a MALDI-TOF instrument. All key benefits of organic matrix-free technologies were satisfied while maintaining a high level of detection performances (sensitivity and reproducibility/repeatability). In particular, sample preparation was simple and detection in the low mass range was not hampered by matrix ions. Imaging studies were undertaken to query sample dispersion into the inert SiO 2 NPs and to help into the search of the best experimental conditions producing homogeneous analyte distribution within the deposit. In contrast to commercial disposable LDI Targets designed for single use and requiring an adaptor such as NALDI™, the proposed SiO 2 NPs pre-spotting on a MALDI Target Plate allowed very easily switching between MALDI and LDI experiments. They can be conducted either simultaneously (positions with an organic matrix or SiO 2 NPs) or in the row (support prepared in advance, stored and washed after use). The overall cost and versatility of the methodology made it very attractive to MALDI users in many domains (peptidomics, proteomics, metabolomics).
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Silica nanoparticles pre-spotted onto Target Plate for laser desorption/ionization mass spectrometry analyses of peptides.
Analytica Chimica Acta, 2012Co-Authors: Mathieu Dupre, Sonia Cantel, Jeanolivier Durand, Jean Martinez, Christine EnjalbalAbstract:Abstract We report on the simple deposition of Stober silica nanoparticles (SiO 2 NPs) on conventional MALDI Target Plate for high throughput laser desorption/ionization mass spectrometry (LDI-MS) analyses of peptide mixtures with sensitivity in the femtomolar range. This low-cost easily prepared material allowed straightforward LDI experiments by deposition of the studied samples directly onto a pre-spotted MALDI Plate. This analytical strategy can be performed in any laboratory equipped with a MALDI-TOF instrument. All key benefits of organic matrix-free technologies were satisfied while maintaining a high level of detection performances (sensitivity and reproducibility/repeatability). In particular, sample preparation was simple and detection in the low mass range was not hampered by matrix ions. Imaging studies were undertaken to query sample dispersion into the inert SiO 2 NPs and to help into the search of the best experimental conditions producing homogeneous analyte distribution within the deposit. In contrast to commercial disposable LDI Targets designed for single use and requiring an adaptor such as NALDI™, the proposed SiO 2 NPs pre-spotting on a MALDI Target Plate allowed very easily switching between MALDI and LDI experiments. They can be conducted either simultaneously (positions with an organic matrix or SiO 2 NPs) or in the row (support prepared in advance, stored and washed after use). The overall cost and versatility of the methodology made it very attractive to MALDI users in many domains (peptidomics, proteomics, metabolomics).
