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Passive Micromixers

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ISBN: 9783038970071 9783038970088 Year: Pages: VIII, 166 Language: Englisch
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Chemical Technology --- Technology (General)
Added to DOAB on : 2018-08-20 17:31:11
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Micro-total analysis systems and lab-on-a-chip platforms are widely used for sample preparation and analysis, drug delivery, and biological and chemical syntheses. A micromixer is an important component in these applications. Rapid and efficient mixing is a challenging task in the design and development of micromixers. The flow in micromixers is laminar, and, thus, the mixing is primarily dominated by diffusion. Recently, diverse techniques have been developed to promote mixing by enlarging the interfacial area between the fluids or by increasing the residential time of fluids in the micromixer. Based on their mixing mechanism, micromixers are classified into two types: active and passive. Passive micromixers are easy to fabricate and generally use geometry modification to cause chaotic advection or lamination to promote the mixing of the fluid samples, unlike active micromixers, which use moving parts or some external agitation/energy for the mixing. Many researchers have studied various geometries to design efficient passive micromixers. Recently, numerical optimization techniques based on computational fluid dynamic analysis have been proven to be efficient tools in the design of micromixers. The current Special Issue covers new mechanisms, design, numerical and/or experimental mixing analysis, and design optimization of various passive micromixers.

Development and Application of Nonlinear Dissipative Device in Structural Vibration Control

Authors: --- --- ---
ISBN: 9783038970378 9783038970385 Year: Pages: X, 232 Language: Englisch
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: General and Civil Engineering
Added to DOAB on : 2018-08-21 15:25:22
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This book entitled Development and Application of Nonlinear Dissipative Device in Structural Vibration Control contains contributions that focus on the development and application of innovative nonlinear dissipative systems that mitigate the potentially catastrophic effects of extreme loading by incorporating new materials or effective mechanical control technologies. Moreover, new nonlinear analytical methods for distinctive vibrating structures under different excitations are also highlighted in this book. It is notable that nonlinear dampers prove superior in energy dissipation compared to linear dampers, such as the wide frequency band of vibration attenuation and high robustness. In light of this, nonlinear dampers have been utilized in many different cases. For example, pounding-tuned mass dampers are employed to alleviate the excessive vibration of power transmission towers, and self-powered magnetorheological dampers are used to suppress the undesirable vibration of long stay cables. The content of this book covers a wide variety of topics that can be mainly divided into three categories, namely, new nonlinear dissipative devices, new simulation tools for vibrating structures undergoing nonlinear stage, and new design/optimum methods for dissipative devices and isolation systems. The contributions presented in this book can provide valuable and constructive reference material for the further study of nonlinear dampers and structures.

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2018 (2)