Microjet generator for highly viscous fluidsFebruary 13, 2018
Liquid jet is utilized in various key technologies such as inkjet printing. However, most methods can eject only low viscosity liquid, which is almost the same viscosity of water. This limitation of the viscosity causes the blurring and dulling color of the ink. To solve these problems, the method of ejecting highly viscous liquid jet is required.
Researchers at Tokyo University of Agriculture and Technology have newly proposed a device of generating microjet with high viscosity, like a honey. To produce the viscous liquid jets, we use an impulsive force i.e. the liquid jet is induced by adding an impact applied at the bottom of a liquid-filled container. Moreover our device relies on additional trick: the wettable thin tube is inserted into the liquid, where liquid level inside the tube is kept deeper than that outside the tube. We find that the liquid inside the tube is significantly accelerated thanks to this trick. As a result, our device can eject a liquid jet with high viscousity, which is more than 1,000 times viscos than water and with non-Newtonian properties such as nail polish. We have also revealed the mechanism of our device via conducting experiments and numerical simulations. Our device overcomes the existing problems such as the limitation of the viscosity and solidifies the base for the next generation manufacturing such as 3D manufacturing and biological printings.
Tokyo University of Agriculture and Technology
Related Viscosity Articles:
New research has revealed how bacteria thin the liquid they are swimming through in order to free themselves when trapped by walls or other obstacles.
Viscous fingering occurs in porous media where fluids of differing viscosity converge in finger-shaped patterns as a result of growing disturbances at the interface.
The existing literatures focus on the flow pattern transition and pressure gradient calculation of model oils.
Scientists have discovered a new method to create fluorescent light that may have promising applications from LEDs to medical imaging.
Scientists at Oxford University have developed a solvent system with reduced toxicity that can be used in the manufacture of perovskite solar cells, clearing one of the barriers to the commercialization of a technology that promises to revolutionize the solar industry.
UCLA nanoscience researchers have determined that a fluid that behaves similarly to water in our day-to-day lives becomes as heavy as honey when trapped in a nanocage of a porous solid, offering new insights into how matter behaves in the nanoscale worl
Scientists have developed a method to estimate weakness in the Earth's outer layers which will help explain and predict volcanic activity and earthquakes.
An advanced imaging technique used to map Earth's outer shell also can provide a measure of strength, finding weak spots and magma upwellings that could point to volcanic or earthquake activity, according to a new study by geologists at the University of Illinois at Urbana-Champaign and the University of Adelaide in Australia.
Researchers have used computer modeling to design carbon dioxide binding materials so that they retain a low viscosity after sponging up carbon dioxide, based on a surprise they found in their explorations.
Article describes possible new paradigm for inertial confinement fusion experiments.
Related Viscosity Reading:
Controlled Markov Processes and Viscosity Solutions (Stochastic Modelling and Applied Probability)
by Wendell H. Fleming (Author), Halil Mete Soner (Author)
This book is an introduction to optimal stochastic control for continuous time Markov processes and the theory of viscosity solutions. It covers dynamic programming for deterministic optimal control problems, as well as to the corresponding theory of viscosity solutions. New chapters in this second edition introduce the role of stochastic optimal control in portfolio optimization and in pricing derivatives in incomplete markets and two-controller, zero-sum differential games.View Details
An Introduction To Viscosity Solutions for Fully Nonlinear PDE with Applications to Calculus of Variations in L∞ (SpringerBriefs in Mathematics)
by Nikos Katzourakis (Author)
The purpose of this book is to give a quick and elementary, yet rigorous, presentation of the rudiments of the so-called theory of Viscosity Solutions which applies to fully nonlinear 1st and 2nd order Partial Differential Equations (PDE). For such equations, particularly for 2nd order ones, solutions generally are non-smooth and standard approaches in order to define a "weak solution" do not apply: classical, strong almost everywhere, weak, measure-valued and distributional solutions either do not exist or may not even be defined. The main reason for the latter failure is that, the standard... View Details
Optimal Control and Viscosity Solutions of Hamilton-Jacobi-Bellman Equations (Modern Birkhäuser Classics)
by Martino Bardi (Author), Italo Capuzzo-Dolcetta (Author)
This softcover book is a self-contained account of the theory of viscosity solutions for first-order partial differential equations of Hamilton–Jacobi type and its interplay with Bellman’s dynamic programming approach to optimal control and differential games. It will be of interest to scientists involved in the theory of optimal control of deterministic linear and nonlinear systems. The work may be used by graduate students and researchers in control theory both as an introductory textbook and as an up-to-date reference book.View Details
Blood Viscosity: Its Role in Cardiovascular Pathophysiology and Hematology
by Gregory D. Sloop (Author), Gregory D. Sloop (Editor)
Psychedelic White: Goa Trance and the Viscosity of Race
by Arun Saldanha (Author)
"Psychedelic White is one of the most innovative, refreshingly different analyses of race I have read in the last decade." —Elizabeth Grosz, author of The Nick of Time: Politics, Evolution and the Untimely
The village of Anjuna, located in the coastal Indian state of Goa, has been one of the premier destinations on the global rave scene for nearly two decades. The birthplace of Goa trance, the most psychedelic variety of electronic dance music, Anjuna first attracted adventurous Westerners in the 1970s who were drawn there by its tropical beaches,... View Details
Viscosity (Thermophysical Properties of Matter)
by Y. S. Touloukian (Author), S. C. Saxena (Author), P. Hestermans (Author)
that about 100 journals are required to yield fifty In 1957, the Thermophysical Properties Research Center (TPRC) of Purdue University, under the percent. But that other fifty percent! It is scattered leadership of its founder, Professor Y. S. Touloukian, through more than 3500 journals and other docu began to develop a coordinated experimental, ments, often items not readily identifiable or ob theoretical, and literature review program covering tainable. Over 75,000 references are now in the files. a set of properties of great importance to science and technology. Over the years, this... View Details
Food Texture and Viscosity, Second Edition: Concept and Measurement
by Malcolm Bourne (Author)
Drawing together literature from a variety of fields, Food Texture and Viscosity, 2E, includes a brief history of this area and its basic principles. It reviews how texture and viscosity are measured, including the physical interactions between the human body and food, objective methods of texture measurements, the latest advances in texture-measuring instruments, various types of liquid flow, and more.
This revised edition contains approximately 30% new material, including two new chapters on physics and texture and the correlation between physical measurements and sensory... View Details
Viscosity Solutions and Applications: Lectures given at the 2nd Session of the Centro Internazionale Matematico Estivo (C.I.M.E.) held in Montecatini ... 12 - 20, 1995 (Lecture Notes in Mathematics)
by Martino Bardi (Author), Michael G. Crandall (Author), Lawrence C. Evans (Author), Halil M. Soner (Author), Panagiotis E. Souganidis (Author), Italo Capuzzo Dolcetta (Editor), Pierre Lions (Editor)
The volume comprises five extended surveys on the recent theory of viscosity solutions of fully nonlinear partial differential equations, and some of its most relevant applications to optimal control theory for deterministic and stochastic systems, front propagation, geometric motions and mathematical finance. The volume forms a state-of-the-art reference on the subject of viscosity solutions, and the authors are among the most prominent specialists. Potential readers are researchers in nonlinear PDE's, systems theory, stochastic processes. View Details
The Mathematical Theory of Non-uniform Gases: An Account of the Kinetic Theory of Viscosity, Thermal Conduction and Diffusion in Gases (Cambridge Mathematical Library)
by Sydney Chapman (Author), T. G. Cowling (Author), C. Cercignani (Foreword)
This classic book, now reissued in paperback, presents a detailed account of the mathematical theory of viscosity, thermal conduction, and diffusion in non-uniform gases based on the solution of the Maxwell-Boltzmann equations. The theory of Chapman and Enskog, describing work on dense gases, quantum theory of collisions, and the theory of conduction and diffusion in ionized gases in the presence of electric and magnetic fields is also included in the later chapters. This reprint of the third edition, first published in 1970, includes revisions that take account of extensions of the theory to... View Details
Food Texture and Viscosity, Second Edition: Concept and Measurement (Food Science and Technology)
by Malcolm Bourne (Author)
Drawing together literature from a variety of fields, Food Texture and Viscosity, Second Edition, includes a brief history of this area and its basic principles. It reviews how texture and viscosity are measured, including the physical interactions between the human body and food, objective methods of texture measurements, the latest advances in texture-measuring instruments, various types of liquid flow, and more.
This revised edition contains approximately 30% new material, including two new chapters on physics and texture and the correlation between physical measurements... View Details