The Experts below are selected from a list of 5601 Experts worldwide ranked by ideXlab platform
Stuart Brown - One of the best experts on this subject based on the ideXlab platform.
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Fluid-Structure Interaction Analysis of a Peristaltic Pump
Proceedings of the 2011 COMSOL Conference, 2011Co-Authors: Nagi Elabbasi, Jörgen Bergström, Stuart BrownAbstract:Peristaltic pumping is an inherently multiphysics problem where the deformation of the tube and the pumped fluid are strongly coupled. We used COMSOL Multiphysics to investigate the performance of a 180 degree rotary peristaltic pump with two metallic Rollers, and an elastomeric tube pumping a viscous Newtonian fluid. The model captures the peristaltic flow, the flow fluctuations that result when the Rollers engage and disengage the tube, and the contact interaction between the Rollers and the tube. We are using the model to investigate the effect of pump design variations such as tube occlusion, tube diameter, and Roller Speed, on the flow rate, flow fluctuations, and stress state in the tube.
G. K. Tyagi - One of the best experts on this subject based on the ideXlab platform.
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Influence of add-on spin finish on yarn quality in the OE spinning of polyester fibre yarns
2008Co-Authors: G. K. TyagiAbstract:The influence of add-on spin finish and opening Roller Speed on the properties of polyester OE rotor yarns spun from fibres of different cross-sectional shapes and linear densities has been studied. The level of spin finish appears to have highest influence on the yarn characteristics followed by the opening Roller Speed and fibre linear density. Higher level of spin finish offers significant advantages in respect of yarn tenacity, breaking extension, work of rupture, abrasion resistance and hairiness but adversely affects regularity and flexural rigidity. Each of these quality parameters deteriorates to different degrees with the increasing opening Roller Speed. There is also decline in properties when yarns are made from a trilobal fibre. Such a decline in properties at high opening Roller Speeds is, however, less marked in yarns spun from fine denier fibres .
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Investigation on cotton ring-and OE rotor yarn characteristics: Part I — Effect of caustic and enzymatic scouring treatments on dye uptake and mechanical characteristics
2007Co-Authors: G. K. Tyagi, Ashvani Goyal, D P Gon, D K MahajanAbstract:The effect of scouring with enzymes and caustic soda on the mechanical and surface characteristics of cotton ring-and rotor-spun yarns has been studied. For both yarn structures, the flexural rigidity, hairiness, yarn-to-metal friction and dye uptake increase markedly on scouring with enzymes and sodium hydroxide. Conventional scouring with NaOH renders the yarns strikingly strong and less extensible. However, the tenacity of both types of yarns is considerably reduced on enzymatic scouring. Scouring causes a marked increase in dye uptake of ring-and rotor-spun yarns; the increase is, however, more in NaOH scoured yarns than in the yarns spun with identical processing conditions but scoured with enzymes. The dye uptake decreases marginally with increasing rotor Speed. The effect of opening Roller Speed on uptake of dye is also minimal.
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Effect of fibre profile, spin finish and opening Roller Speed on properties of polyester OE rotor-spun yarns
Indian Journal of Fibre & Textile Research, 2003Co-Authors: G. K. TyagiAbstract:The influence of fibre profile, spin finish and opening Roller Speed on quality of polyester OE rotor-spun yarns has been studied. The spin finish and opening Roller interact with each other to determine yarn properties. This is because the inter-fibre friction, which depends to a large extent on the combined influence of fibre structural variants and spin finish, plays an important role in influencing fibre separation by opening Roller. It is observed that the yarns made from a trilobal fibre are inferior to the yarns made from a circular fibre spun under the same condition in terms of tenacity, breaking extension, work of rupture, hairiness and regularity. The yarn tensile properties generally show a descending trend with increasing opening Roller Speed. The drop in tensile properties, however, depends on the level of add-on finish. The yarn regularity is also highly dependent on the add-on finish and opening Roller Speed. The yarns produced with higher opening Roller Speed show lower unevenness and fewer imperfections, particularly at higher level of add-on finish.
Nagi Elabbasi - One of the best experts on this subject based on the ideXlab platform.
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Fluid-Structure Interaction Analysis of a Peristaltic Pump
Proceedings of the 2011 COMSOL Conference, 2011Co-Authors: Nagi Elabbasi, Jörgen Bergström, Stuart BrownAbstract:Peristaltic pumping is an inherently multiphysics problem where the deformation of the tube and the pumped fluid are strongly coupled. We used COMSOL Multiphysics to investigate the performance of a 180 degree rotary peristaltic pump with two metallic Rollers, and an elastomeric tube pumping a viscous Newtonian fluid. The model captures the peristaltic flow, the flow fluctuations that result when the Rollers engage and disengage the tube, and the contact interaction between the Rollers and the tube. We are using the model to investigate the effect of pump design variations such as tube occlusion, tube diameter, and Roller Speed, on the flow rate, flow fluctuations, and stress state in the tube.
Arun Bhimrao Dahake - One of the best experts on this subject based on the ideXlab platform.
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Effect of Roller Speed and Moisture Content of Cotton on Ginning Rate, Lint Quality and Electric Energy Consumption in Double Roller Gins
Textile Research Journal, 2007Co-Authors: Prashantkumar Gulabrao Patil, Pramod Madhukar Padole, Jugalkishar Fulchand Agrawal, Arun Bhimrao DahakeAbstract:To optimize the ginning parameters, a study was performed to investigate the influence of leather Roller Speed, fiber moisture on ginning rate, lint quality and electric energy consumption during ginning on double Roller ginning machine. Seed cottons of different staple lengths were ginned at three levels of Roller Speed and moisture contents and experiments were performed on a specially designed experimental set up, which recorded Roller revolutions per minute (RPM) and energy consumption. Duncan's Multiple Range Test revealed that the highest Roller Speed of 120 RPM coupled with 7 % moisture content of seed cotton showed the highest ginning rate with maximum saving in electric energy. Further, the highest ginning rate and maximum energy saving were observed for higher staple length of fibers as compared to lower staple length of fibers. Fiber properties of lint obtained from different treatments were measured using High Volume Instrument and Advanced Fiber Instrumentation System and results showed that the important fiber parameters remain unaffected.
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Effect of Roller Speed and Moisture Content of Cotton on Ginning Rate, Lint Quality and Electric Energy Consumption in Double Roller Gins
Textile Research Journal, 2007Co-Authors: Prashantkumar Gulabrao Patil, Pramod Madhukar Padole, Jugalkishar Fulchand Agrawal, Arun Bhimrao DahakeAbstract:To optimize the ginning parameters, a study was performed to investigate the influence of leather Roller Speed, fiber moisture on ginning rate, lint quality and electric energy consumption during g...
Jörgen Bergström - One of the best experts on this subject based on the ideXlab platform.
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Fluid-Structure Interaction Analysis of a Peristaltic Pump
Proceedings of the 2011 COMSOL Conference, 2011Co-Authors: Nagi Elabbasi, Jörgen Bergström, Stuart BrownAbstract:Peristaltic pumping is an inherently multiphysics problem where the deformation of the tube and the pumped fluid are strongly coupled. We used COMSOL Multiphysics to investigate the performance of a 180 degree rotary peristaltic pump with two metallic Rollers, and an elastomeric tube pumping a viscous Newtonian fluid. The model captures the peristaltic flow, the flow fluctuations that result when the Rollers engage and disengage the tube, and the contact interaction between the Rollers and the tube. We are using the model to investigate the effect of pump design variations such as tube occlusion, tube diameter, and Roller Speed, on the flow rate, flow fluctuations, and stress state in the tube.
