Author: Publisher:
ISBN:
Category : Fluid dynamics
Languages : en
Pages : 340
Book Description
28th AIAA Fluid Dynamics Conference, 4th AIAA Shear Flow Control Conference
Author: Computational heat and mass transfer – CHMT 2001- Vol. I
Author: Publisher: Editora E-papers
ISBN: 8587922440
Category :
Languages : en
Pages : 413
Book Description
Tribology Issues and Opportunities in MEMS
Author: Bharat BhushanPublisher: Springer Science & Business Media
ISBN: 9401150508
Category : Science
Languages : en
Pages : 652
Book Description
Micro Electro Mechanical Systems (MEMS) is already about a billion dollars a year industry and is growing rapidly. So far major emphasis has been placed on the fabrication processes for various devices. There are serious issues related to tribology, mechanics, surfacechemistry and materials science in the operationand manufacturingof many MEMS devices and these issues are preventing an even faster commercialization. Very little is understood about tribology and mechanical properties on micro- to nanoscales of the materials used in the construction of MEMS devices. The MEMS community needs to be exposed to the state-of-the-artoftribology and vice versa. Fundamental understanding of friction/stiction, wear and the role of surface contamination and environmental debris in micro devices is required. There are significantadhesion, friction and wear issues in manufacturing and actual use, facing the MEMS industry. Very little is understood about the tribology of bulk silicon and polysilicon films used in the construction ofthese microdevices. These issues are based on surface phenomenaand cannotbe scaled down linearly and these become increasingly important with the small size of the devices. Continuum theory breaks down in the analyses, e. g. in fluid flow of micro-scale devices. Mechanical properties ofpolysilicon and other films are not well characterized. Roughness optimization can help in tribological improvements. Monolayers of lubricants and other materials need to be developed for ultra-low friction and near zero wear. Hard coatings and ion implantation techniques hold promise.
Efficiency, Performance and Robustness of Gas Turbines
Author: Konstantin VolkovPublisher: BoD – Books on Demand
ISBN: 9535104640
Category : Technology & Engineering
Languages : en
Pages : 249
Book Description
A wide range of issues related to analysis of gas turbines and their engineering applications are considered in the book. Analytical and experimental methods are employed to identify failures and quantify operating conditions and efficiency of gas turbines. Gas turbine engine defect diagnostic and condition monitoring systems, operating conditions of open gas turbines, reduction of jet mixing noise, recovery of exhaust heat from gas turbines, appropriate materials and coatings, ultra micro gas turbines and applications of gas turbines are discussed. The open exchange of scientific results and ideas will hopefully lead to improved reliability of gas turbines.
Microactuators
Author: Massood Tabib-AzarPublisher: Springer Science & Business Media
ISBN: 1461554454
Category : Technology & Engineering
Languages : en
Pages : 297
Book Description
219 8. 2 Sensors 221 8. 3 Physical Sensors 222 8. 3. 1 Electrical Sensing Means 223 8. 3. 2 Magnetic Field Methods 231 8. 3. 3 Optical Methods 232 8. 4 Chemical Sensors 241 8. 4. 1 Electrical Gas and Chemical Sensors 243 8. 4. 2 Guided-Optics Intrinsic Chemical Sensors 246 8. 4. 3 Extrinsic Chemical Sensors 250 8. 4. 4 Polymer Waveguide Chemical Sensors 251 8. 4. 5 Surface Plasmon Chemical Sensors 252 8. 4. 6 Indicator-Mediated Extrinsic Sensing 253 8. 4. 7 Optical Biosensors 256 8. 4. 8 Ultrasonic Gas and Chemical Sensors 257 8. 4. 9 Intelligent Sensors 258 8. 5 Connections/Links and Wiring 258 8. 5. 1 Optical Links 260 8. 5. 2 Requirement on the Processing Unit/Intelligence 262 8. 6 Actuators 263 8. 7 Signal Processing/Computing 264 8. 7. 1 Implicit Computation 266 8. 7. 2 Explicit Computation 267 8. 8 References 274 Subject Index 279 Micro-Actuators (Electrical, Magnetic, Thermal, Optical, Mechanical, and Chemical) It has become quite apparent that sensors and actuators are the main bottleneck of the modem information processing and control systems. Microprocessors and computers used to be the main limiting element in most information processing systems. But thanks to the enonnous progress in the microelectronics industry, most information analysis tasks can be processed in real time. The data has to be acquired by the processor in some form and processed and used to produce some useful function in the real world.
Microscale Heat Transfer - Fundamentals and Applications
Author: S. KakaçPublisher: Springer Science & Business Media
ISBN: 9781402033605
Category : Science
Languages : en
Pages : 530
Book Description
This volume provides a comprehensive state-of-the art assessment of the fundamentals of the Microscale heat transfer and transport phenomena and heat transfer and applications in Microsystems. The modern trend toward miniaturization of devices requires a better understanding of heat mass transfer phenomena in small dimensions. Devices having dimensions of order of microns are being developed for use of cooling of integrated circuits, and in biochemicals-biomedical applications and cryogenics. Microelectromechanical systems (MEMS) have an important impact in medicine, bioengineering, information technologies and other industries.
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