Inverse leidenfrost drop manipulation using menisci - Soft.
The Leidenfrost pump design consists of a closed-channel with ratcheted sidewalls to propel the liquid. A key feature of the closed channel pump is a proposed concept for vapor removal. The vapor is extracted from the liquid channel to the surrounding atmosphere through separate variable-depth channels. The Marangoni pump design consists of an open-channel with a ratcheted bottom channel wall.
This report presents a study on the Leidenfrost point and film boiling of single droplets and sprays. The first portion of the work includes fundamental studies of impinging droplet fluid and heat transfer characteristics presented in the form of droplet impact behavior regime maps.
In this thesis, the Leidenfrost drop has been introduced as a water-based green chemical reactor for simultaneous synthesis and self-organization of nanostructures. An important contribution of this work is in exploring the origin and mechanism of the nanofabrication at Leidenfrost condition.
Here, we study this reflection in detail, and show that frictionless Leidenfrost drops are a simple and efficient tool to probe the shape of an unknown interface. We then use the menisci to control the motion of the otherwise elusive drops. We create waveguides to direct and accelerate them and use parabolic walls to reflect and focus them.
Abstract: The Leidenfrost effect influences substantially the contact of a liquid droplet with a hot surface. Contact between the liquid and solid is crucial for cooling applications such as fire-fighting, hot-mill steel rolling, thermal power plants and microprocessor cooling.
This dissertation is divided into five main studies, which analyze different aspects of electrostatic suppression of the Leidenfrost state. The first part of this dissertation (Chapter 2) describes droplet-based experimental investigations on electrostatic suppression of the Leidenfrost state. It is demonstrated that the Leidenfrost state can be suppressed and surface dryout can be prevented.
For instance, it can occur for a Leidenfrost droplet; a water drop levitating above a hot plate whose temperature is much higher than the boiling temperature. In this case, boiling occurs in the film of saturated vapor which is entrapped between the bottom of the drop and the plate, whereas the top of the water droplet evaporates in contact of ambient air. The situation can also be ambiguous.
Jumping Leidenfrost droplets Master Thesis Author: Mehri Baktash Main Supervisor: Prof. Heiner Linke Co-supervisor: Cassandra Niman Division of Solid State Physics Department of Physics 2012. Abstract A leidenfrost droplet forms when a liquid droplet is placed on a very hot surface. In the case that there is a thin layer of insulating material as a step on the substrate, under speci c.
The U.S. Department of Energy's Office of Scientific and Technical Information.
The subject of the present thesis is the numerical modeling and investigation of boiling phenomena. The heat transfer during boiling is highly efficient and therefore used for many applications in power generation, process engineering and cooling of high performance electronics. The precise knowledge of particular boiling processes, their relevant parameters and limitations is of utmost.
Fingerprint Dive into the research topics where Kei Takashina is active. These topic labels come from the works of this person. Together they form a unique fingerprint. 2 Similar Profiles.
In this thesis, the Leidenfrost drop has been introduced as a water-based green chemical reactor for simultaneous synthesis and self-organization of nanostructures. An important contribution of this work is in exploring the origin and mechanism of the nanofabrication at Leidenfrost condition. It turns out that these conditions are based upon overheated and charged nature of the droplet.
Leidenfrost effect refers to drops released on substrate heated above a threshold temperature. Above this temperature, the drop levitates over a film of its own vapour, preventing contact with the substrate.
Upload student thesis; Statistics; Contact; UT Research Information; UT Proceedings; Faculty ITC Master Theses; Search; University of Twente. Student Theses. University of Twente Student Theses. Login. Splashing of Leidenfrost druplets Geerdink, B. (2013) Splashing of Leidenfrost druplets. PDF 19MB: Abstract: When a droplet impinges on a smooth heated surface, which is heated above the.
To investigate these puzzles, a Leidenfrost collider was constructed on which drops floating on a vapor layer were guided to merge and subsequently jump on a substrate heated well above the liquid boiling point. The jumping velocity upon symmetric coalescence of equally-sized drops was observed to follow the capillary-inertial scaling, and the non-dimensional jumping velocity of approximately.
Essay on computer crime hacking websites psaume 1 explication essay 48 shades of brown essay college predictions of the future world essay life defining moment essays kira radinsky dissertation abstract to live movie essays short essay on rose plant essay on auteur theory in film negative effects of social media essay conclusion 2005 ap lang essay onion simplex algorithmus beispiel essay.