The Experts below are selected from a list of 66444 Experts worldwide ranked by ideXlab platform
Tomasz Bednarz - One of the best experts on this subject based on the ideXlab platform.
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enhancing natural convection in a cube using a strong magnetic field experimental Heat Transfer Rate measurements and flow visualization
International Communications in Heat and Mass Transfer, 2009Co-Authors: Tomasz Bednarz, Chengwang Lei, John C Patterson, Hiroyuki OzoeAbstract:The effect of a strong magnetic field on the average Heat Transfer Rate and flow profiles of joint gravitational and thermo-magnetic convection of a paramagnetic fluid in a cubic enclosure Heated from below and cooled from above was experimentally investigated. The working fluid consisted of 80% mass glycerol aqueous solution with a concentration of 0.8 mol/kg gadolinium nitRate hexahydRate making it paramagnetic. The cubic enclosure of 32-mm sides was located in the 10-cm bore of a horizontally oriented 5-Tesla super-conducting magnet at a position where the magnetic force distribution was relatively uniform. Under this configuration, the magnetic field imposed in the horizontal direction acted perpendicularly to gravity. It was found that the Heat Transfer Rate through the cube increased with the increase of the magnetic induction. Furthermore, steady and transient state flow visualizations were carried out with a 10-Tesla super-conducting magnet to show a change in the temperature field when magnet-thermo convection dominated. Visualization was made using thermo-chromic liquid crystal slurry added to the working fluid and illuminated in a vertical cross-section of the cube.
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suppressing rayleigh benard convection in a cube using a strong magnetic field experimental Heat Transfer Rate measurements and flow visualization
International Communications in Heat and Mass Transfer, 2009Co-Authors: Tomasz Bednarz, Chengwang Lei, John C Patterson, Hiroyuki OzoeAbstract:The average Heat Transfer Rate of joint gravitational and magnetic convection of a paramagnetic fluid (an 80% mass aqueous solution of glycerol with 0.8 mol/kg concentration of gadolinium nitRate hexahydRate) in a cubic enclosure Heated from below and cooled from above is experimentally measured for five different strengths of the magnetic field. The cubic enclosure of 0.032-m sides is placed in the bore of a 5-Tesla super-conducting magnet below the solenoid centre at a position where the magnetic force distribution is relatively uniform. The magnetic field imposed in the vertical direction acts against gravity and the Heat Transfer Rate decreases with the increase of the magnetic induction. Furthermore, steady and transient states flow visualizations are carried out with a 10-Tesla super-conducting magnet to show a stable stratification obtained in the form of magneto-thermal.
Hiroyuki Ozoe - One of the best experts on this subject based on the ideXlab platform.
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enhancing natural convection in a cube using a strong magnetic field experimental Heat Transfer Rate measurements and flow visualization
International Communications in Heat and Mass Transfer, 2009Co-Authors: Tomasz Bednarz, Chengwang Lei, John C Patterson, Hiroyuki OzoeAbstract:The effect of a strong magnetic field on the average Heat Transfer Rate and flow profiles of joint gravitational and thermo-magnetic convection of a paramagnetic fluid in a cubic enclosure Heated from below and cooled from above was experimentally investigated. The working fluid consisted of 80% mass glycerol aqueous solution with a concentration of 0.8 mol/kg gadolinium nitRate hexahydRate making it paramagnetic. The cubic enclosure of 32-mm sides was located in the 10-cm bore of a horizontally oriented 5-Tesla super-conducting magnet at a position where the magnetic force distribution was relatively uniform. Under this configuration, the magnetic field imposed in the horizontal direction acted perpendicularly to gravity. It was found that the Heat Transfer Rate through the cube increased with the increase of the magnetic induction. Furthermore, steady and transient state flow visualizations were carried out with a 10-Tesla super-conducting magnet to show a change in the temperature field when magnet-thermo convection dominated. Visualization was made using thermo-chromic liquid crystal slurry added to the working fluid and illuminated in a vertical cross-section of the cube.
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suppressing rayleigh benard convection in a cube using a strong magnetic field experimental Heat Transfer Rate measurements and flow visualization
International Communications in Heat and Mass Transfer, 2009Co-Authors: Tomasz Bednarz, Chengwang Lei, John C Patterson, Hiroyuki OzoeAbstract:The average Heat Transfer Rate of joint gravitational and magnetic convection of a paramagnetic fluid (an 80% mass aqueous solution of glycerol with 0.8 mol/kg concentration of gadolinium nitRate hexahydRate) in a cubic enclosure Heated from below and cooled from above is experimentally measured for five different strengths of the magnetic field. The cubic enclosure of 0.032-m sides is placed in the bore of a 5-Tesla super-conducting magnet below the solenoid centre at a position where the magnetic force distribution is relatively uniform. The magnetic field imposed in the vertical direction acts against gravity and the Heat Transfer Rate decreases with the increase of the magnetic induction. Furthermore, steady and transient states flow visualizations are carried out with a 10-Tesla super-conducting magnet to show a stable stratification obtained in the form of magneto-thermal.
John C Patterson - One of the best experts on this subject based on the ideXlab platform.
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enhancing natural convection in a cube using a strong magnetic field experimental Heat Transfer Rate measurements and flow visualization
International Communications in Heat and Mass Transfer, 2009Co-Authors: Tomasz Bednarz, Chengwang Lei, John C Patterson, Hiroyuki OzoeAbstract:The effect of a strong magnetic field on the average Heat Transfer Rate and flow profiles of joint gravitational and thermo-magnetic convection of a paramagnetic fluid in a cubic enclosure Heated from below and cooled from above was experimentally investigated. The working fluid consisted of 80% mass glycerol aqueous solution with a concentration of 0.8 mol/kg gadolinium nitRate hexahydRate making it paramagnetic. The cubic enclosure of 32-mm sides was located in the 10-cm bore of a horizontally oriented 5-Tesla super-conducting magnet at a position where the magnetic force distribution was relatively uniform. Under this configuration, the magnetic field imposed in the horizontal direction acted perpendicularly to gravity. It was found that the Heat Transfer Rate through the cube increased with the increase of the magnetic induction. Furthermore, steady and transient state flow visualizations were carried out with a 10-Tesla super-conducting magnet to show a change in the temperature field when magnet-thermo convection dominated. Visualization was made using thermo-chromic liquid crystal slurry added to the working fluid and illuminated in a vertical cross-section of the cube.
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suppressing rayleigh benard convection in a cube using a strong magnetic field experimental Heat Transfer Rate measurements and flow visualization
International Communications in Heat and Mass Transfer, 2009Co-Authors: Tomasz Bednarz, Chengwang Lei, John C Patterson, Hiroyuki OzoeAbstract:The average Heat Transfer Rate of joint gravitational and magnetic convection of a paramagnetic fluid (an 80% mass aqueous solution of glycerol with 0.8 mol/kg concentration of gadolinium nitRate hexahydRate) in a cubic enclosure Heated from below and cooled from above is experimentally measured for five different strengths of the magnetic field. The cubic enclosure of 0.032-m sides is placed in the bore of a 5-Tesla super-conducting magnet below the solenoid centre at a position where the magnetic force distribution is relatively uniform. The magnetic field imposed in the vertical direction acts against gravity and the Heat Transfer Rate decreases with the increase of the magnetic induction. Furthermore, steady and transient states flow visualizations are carried out with a 10-Tesla super-conducting magnet to show a stable stratification obtained in the form of magneto-thermal.
Chengwang Lei - One of the best experts on this subject based on the ideXlab platform.
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enhancing natural convection in a cube using a strong magnetic field experimental Heat Transfer Rate measurements and flow visualization
International Communications in Heat and Mass Transfer, 2009Co-Authors: Tomasz Bednarz, Chengwang Lei, John C Patterson, Hiroyuki OzoeAbstract:The effect of a strong magnetic field on the average Heat Transfer Rate and flow profiles of joint gravitational and thermo-magnetic convection of a paramagnetic fluid in a cubic enclosure Heated from below and cooled from above was experimentally investigated. The working fluid consisted of 80% mass glycerol aqueous solution with a concentration of 0.8 mol/kg gadolinium nitRate hexahydRate making it paramagnetic. The cubic enclosure of 32-mm sides was located in the 10-cm bore of a horizontally oriented 5-Tesla super-conducting magnet at a position where the magnetic force distribution was relatively uniform. Under this configuration, the magnetic field imposed in the horizontal direction acted perpendicularly to gravity. It was found that the Heat Transfer Rate through the cube increased with the increase of the magnetic induction. Furthermore, steady and transient state flow visualizations were carried out with a 10-Tesla super-conducting magnet to show a change in the temperature field when magnet-thermo convection dominated. Visualization was made using thermo-chromic liquid crystal slurry added to the working fluid and illuminated in a vertical cross-section of the cube.
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suppressing rayleigh benard convection in a cube using a strong magnetic field experimental Heat Transfer Rate measurements and flow visualization
International Communications in Heat and Mass Transfer, 2009Co-Authors: Tomasz Bednarz, Chengwang Lei, John C Patterson, Hiroyuki OzoeAbstract:The average Heat Transfer Rate of joint gravitational and magnetic convection of a paramagnetic fluid (an 80% mass aqueous solution of glycerol with 0.8 mol/kg concentration of gadolinium nitRate hexahydRate) in a cubic enclosure Heated from below and cooled from above is experimentally measured for five different strengths of the magnetic field. The cubic enclosure of 0.032-m sides is placed in the bore of a 5-Tesla super-conducting magnet below the solenoid centre at a position where the magnetic force distribution is relatively uniform. The magnetic field imposed in the vertical direction acts against gravity and the Heat Transfer Rate decreases with the increase of the magnetic induction. Furthermore, steady and transient states flow visualizations are carried out with a 10-Tesla super-conducting magnet to show a stable stratification obtained in the form of magneto-thermal.
A Zachar - One of the best experts on this subject based on the ideXlab platform.
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investigation of natural convection induced outer side Heat Transfer Rate of coiled tube Heat exchangers
International Journal of Heat and Mass Transfer, 2012Co-Authors: A ZacharAbstract:Abstract Natural convection induced Heat Transfer has been studied over the outer surface of helically coiled-tube Heat exchangers. Several different geometrical configurations (curvature ratio δ e [0.035, 0.082]) and a wide range of flow parameters (60 T tank T in = 19 and 60 T in T tank = 20, 4000 In addition to this the qualitative behavior of the peripherally averaged Nusselt number versus the axial location along the helical tube function is strongly dependent on the direction of the Heat flow (from the tube to the storage tank and the reversed direction). Inner side Heat Transfer Rate of helical coils have also been investigated in case of fluid-to-fluid boundary conditions and the calculation results have been compared with different prediction formulas published in the last couples of decades.
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analysis of coiled tube Heat exchangers to improve Heat Transfer Rate with spirally corrugated wall
International Journal of Heat and Mass Transfer, 2010Co-Authors: A ZacharAbstract:Abstract Steady Heat Transfer enhancement has been studied in helically coiled-tube Heat exchangers. The outer side of the wall of the Heat exchanger contains a helical corrugation which makes a helical rib on the inner side of the tube wall to induce additional swirling motion of fluid particles. Numerical calculations have been carried out to examine different geometrical parameters and the impact of flow and thermal boundary conditions for the Heat Transfer Rate in laminar and transitional flow regimes. Calculated results have been compared to existing empirical formulas and experimental tests to investigate the validity of the numerical results in case of common helical tube Heat exchanger and additionally results of the numerical computation of corrugated straight tubes for laminar and transition flow have been validated with experimental tests available in the literature. Comparison of the flow and temperature fields in case of common helical tube and the coil with spirally corrugated wall configuration are discussed. Heat exchanger coils with helically corrugated wall configuration show 80–100% increase for the inner side Heat Transfer Rate due to the additionally developed swirling motion while the relative pressure drop is 10–600% larger compared to the common helically coiled Heat exchangers. New empirical correlation has been proposed for the fully developed inner side Heat Transfer prediction in case of helically corrugated wall configuration.
