On the Shape of Giant Soap Bubbles
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Observation of Elliptically Polarized Light from Total Internal Reflection in Bubbles
Observation of elliptically polarized light from total internal reflection in bubbles Item Type Article Authors Miller, Sawyer; Ding, Yitian; Jiang, Linan; Tu, Xingzhou; Pau, Stanley Citation Miller, S., Ding, Y., Jiang, L. et al. Observation of elliptically polarized light from total internal reflection in bubbles. Sci Rep 10, 8725 (2020). https://doi.org/10.1038/s41598-020-65410-5 DOI 10.1038/s41598-020-65410-5 Publisher NATURE PUBLISHING GROUP Journal SCIENTIFIC REPORTS Rights Copyright © The Author(s) 2020. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License. Download date 29/09/2021 02:08:57 Item License https://creativecommons.org/licenses/by/4.0/ Version Final published version Link to Item http://hdl.handle.net/10150/641865 www.nature.com/scientificreports OPEN Observation of elliptically polarized light from total internal refection in bubbles Sawyer Miller1,2 ✉ , Yitian Ding1,2, Linan Jiang1, Xingzhou Tu1 & Stanley Pau1 ✉ Bubbles are ubiquitous in the natural environment, where diferent substances and phases of the same substance forms globules due to diferences in pressure and surface tension. Total internal refection occurs at the interface of a bubble, where light travels from the higher refractive index material outside a bubble to the lower index material inside a bubble at appropriate angles of incidence, which can lead to a phase shift in the refected light. Linearly polarized skylight can be converted to elliptically polarized light with efciency up to 53% by single scattering from the water-air interface. Total internal refection from air bubble in water is one of the few sources of elliptical polarization in the natural world. -
A Monte Carlo Ray Tracing Study of Polarized Light Propagation in Liquid Foams
ARTICLE IN PRESS Journal of Quantitative Spectroscopy & Radiative Transfer 104 (2007) 277–287 www.elsevier.com/locate/jqsrt A Monte Carlo ray tracing study of polarized light propagation in liquid foams J.N. Swamya,Ã, Czarena Crofchecka, M. Pinar Mengu¨c- b,ÃÃ aDepartment of Biosystems and Agricultural Engineering, 128 C E Barnhart Building, University of Kentucky, Lexington, KY 40546, USA bDepartment of Mechanical Engineering, 269 Ralph G. Anderson Building, University of Kentucky, Lexington, KY 40506, USA Received 10 July 2006; accepted 28 July 2006 Abstract A Monte Carlo ray tracing scheme is used to investigate the propagation of an incident collimated beam of polarized light in liquid foams. Cellular structures like foam are expected to change the polarization characteristics due to multiple scattering events, where such changes can be used to monitor foam dynamics. A statistical model utilizing some of the recent developments in foam physics is coupled with a vector Monte Carlo scheme to compute the depolarization ratios via Stokes–Mueller formalism. For the simulations, the incident Stokes vector corresponding to horizontal linear polarization and right circular polarization are considered. It is observed that bubble size and the polydispersity parameter have a significant effect on the depolarization ratios. This is partially owing to the number of total internal reflection events in the Plateau borders. The results are discussed in terms of applicability of polarized light as a diagnostic tool for monitoring foams. r 2006 Elsevier Ltd. All rights reserved. Keywords: Polarized light scattering; Liquid foams; Bubble size; Polydispersity; Foam characterization; Foam diagnostics; Cellular structures 1. Introduction Liquid foams are random packing of bubbles in a small amount of immiscible liquid [1] and can be found in a wide variety of applications. -
The Synergistic Effect of Focused Ultrasound and Biophotonics to Overcome the Barrier of Light Transmittance in Biological Tissue
Photodiagnosis and Photodynamic Therapy 33 (2021) 102173 Contents lists available at ScienceDirect Photodiagnosis and Photodynamic Therapy journal homepage: www.elsevier.com/locate/pdpdt The synergistic effect of focused ultrasound and biophotonics to overcome the barrier of light transmittance in biological tissue Jaehyuk Kim a,b, Jaewoo Shin c, Chanho Kong c, Sung-Ho Lee a, Won Seok Chang c, Seung Hee Han a,d,* a Molecular Imaging, Princess Margaret Cancer Centre, Toronto, ON, Canada b Health and Medical Equipment, Samsung Electronics Co. Ltd., Suwon, Republic of Korea c Department of Neurosurgery, Brain Research Institute, Yonsei University College of Medicine, Seoul, Republic of Korea d Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada ARTICLE INFO ABSTRACT Keywords: Optical technology is a tool to diagnose and treat human diseases. Shallow penetration depth caused by the high Light transmission enhancement optical scattering nature of biological tissues is a significantobstacle to utilizing light in the biomedical field. In Focused Ultrasound this paper, light transmission enhancement in the rat brain induced by focused ultrasound (FUS) was observed Air bubble and the cause of observed enhancement was analyzed. Both air bubbles and mechanical deformation generated Mechanical deformation by FUS were cited as the cause. The Monte Carlo simulation was performed to investigate effects on transmission Rat brain by air bubbles and finiteelement method was also used to describe mechanical deformation induced by motions of acoustic particles. As a result, it was found that the mechanical deformation was more suitable to describe the transmission change according to the FUS pulse observed in the experiment. 1. -
Ocean Storage
277 6 Ocean storage Coordinating Lead Authors Ken Caldeira (United States), Makoto Akai (Japan) Lead Authors Peter Brewer (United States), Baixin Chen (China), Peter Haugan (Norway), Toru Iwama (Japan), Paul Johnston (United Kingdom), Haroon Kheshgi (United States), Qingquan Li (China), Takashi Ohsumi (Japan), Hans Pörtner (Germany), Chris Sabine (United States), Yoshihisa Shirayama (Japan), Jolyon Thomson (United Kingdom) Contributing Authors Jim Barry (United States), Lara Hansen (United States) Review Editors Brad De Young (Canada), Fortunat Joos (Switzerland) 278 IPCC Special Report on Carbon dioxide Capture and Storage Contents EXECUTIVE SUMMARY 279 6.7 Environmental impacts, risks, and risk management 298 6.1 Introduction and background 279 6.7.1 Introduction to biological impacts and risk 298 6.1.1 Intentional storage of CO2 in the ocean 279 6.7.2 Physiological effects of CO2 301 6.1.2 Relevant background in physical and chemical 6.7.3 From physiological mechanisms to ecosystems 305 oceanography 281 6.7.4 Biological consequences for water column release scenarios 306 6.2 Approaches to release CO2 into the ocean 282 6.7.5 Biological consequences associated with CO2 6.2.1 Approaches to releasing CO2 that has been captured, lakes 307 compressed, and transported into the ocean 282 6.7.6 Contaminants in CO2 streams 307 6.2.2 CO2 storage by dissolution of carbonate minerals 290 6.7.7 Risk management 307 6.2.3 Other ocean storage approaches 291 6.7.8 Social aspects; public and stakeholder perception 307 6.3 Capacity and fractions retained -
Bubble-Mania the Bubbling Clues to Magma Viscosity and Eruptions
Earthlearningidea - http://www.earthlearningidea.com/ Bubble-mania The bubbling clues to magma viscosity and eruptions Pour a viscous liquid (eg. honey, syrup) into Honey and a one transparent container and a pale-coloured soft drink – ready for soft drink (eg. ginger beer) or just coloured bubble-mania. water into another. Put both of these onto a plastic tray or table. Ask your pupils to use a drinking straw to blow bubbles into the soft Apparatus photo: drink, then ask them to ‘use the same blow’ to Chris King blow bubbles in the more viscous liquid. When nothing happens, ask them to blow harder until the liquid ‘erupts’. Ask: • How were the ‘eruptions’ different? • How were the bubbles different? • What caused the differences? • Some volcanoes have magmas that are Magma fountain ‘runny’ (like the soft drink) and some have within the crater much more viscous magmas (like the other of Volcan liquid) – how might these volcanoes erupt Villarrica, Pucón, differently? Chile. • Which sort of eruption would you most like to This file is see – one with low viscosity (runny) magma, licensed by Jonathan Lewis like the soft drink, or one with high viscosity under the Creative (thick) magma like the viscous liquid? Commons Attribution-Share Alike 2.0 Generic license. ……………………………………………………………………………………………………………………………… The back up Title: Bubble-mania • How were the ‘eruptions’ different? It was easy to blow bubbles into the soft drink Subtitle: The bubbling clues to magma viscosity and it ‘fizzed’ a bit, but the bubbles soon and eruptions disappeared; it was much harder to blow bubbles into the viscous liquid and they grew Topic: A simple test of the viscosity of two similar- large and sometimes burst out of the container looking liquids, linked to volcanic eruption style. -
Governing Equations for Simulations of Soap Bubbles
University of California Merced Capstone Project Governing Equations For Simulations Of Soap Bubbles Author: Research Advisor: Ivan Navarro Fran¸cois Blanchette 1 Introduction The capstone project is an extension of work previously done by Fran¸coisBlanchette and Terry P. Bigioni in which they studied the coalescence of drops with either a hori- zontal reservoir or a drop of a different size (Blanchette and Bigioni, 2006). Specifically, they looked at the partial coalescence of a drop, which leaves behind a smaller "daugh- ter" droplet due to the incomplete merging process. Numerical simulations were used to study coalescence of a drop slowly coming into contact with a horizontal resevoir in which the fluid in the drop is the same fluid as that below the interface (Blanchette and Bigioni, 2006). The research conducted by Blanchette and Bigioni starts with a drop at rest on a flat interface. A drop of water will then merge with an underlying resevoir (water in this case), forming a single interface. Our research involves using that same numerical ap- proach only this time a soap bubble will be our fluid of interest. Soap bubbles differ from water drops on the fact that rather than having just a single interface, we now have two interfaces to take into account; the air inside the soap bubble along with the soap film on the boundary, and the soap film with any other fluid on the outside. Due to this double interface, some modifications will now be imposed on the boundary conditions involving surface tension along the interface. Also unlike drops, soap bubble thickness is finite which will mean we must keep track of it. -
The Life of a Surface Bubble
molecules Review The Life of a Surface Bubble Jonas Miguet 1,†, Florence Rouyer 2,† and Emmanuelle Rio 3,*,† 1 TIPS C.P.165/67, Université Libre de Bruxelles, Av. F. Roosevelt 50, 1050 Brussels, Belgium; [email protected] 2 Laboratoire Navier, Université Gustave Eiffel, Ecole des Ponts, CNRS, 77454 Marne-la-Vallée, France; fl[email protected] 3 Laboratoire de Physique des Solides, CNRS, Université Paris-Saclay, 91405 Orsay, France * Correspondence: [email protected]; Tel.: +33-1691-569-60 † These authors contributed equally to this work. Abstract: Surface bubbles are present in many industrial processes and in nature, as well as in carbon- ated beverages. They have motivated many theoretical, numerical and experimental works. This paper presents the current knowledge on the physics of surface bubbles lifetime and shows the diversity of mechanisms at play that depend on the properties of the bath, the interfaces and the ambient air. In particular, we explore the role of drainage and evaporation on film thinning. We highlight the existence of two different scenarios depending on whether the cap film ruptures at large or small thickness compared to the thickness at which van der Waals interaction come in to play. Keywords: bubble; film; drainage; evaporation; lifetime 1. Introduction Bubbles have attracted much attention in the past for several reasons. First, their ephemeral Citation: Miguet, J.; Rouyer, F.; nature commonly awakes children’s interest and amusement. Their visual appeal has raised Rio, E. The Life of a Surface Bubble. interest in painting [1], in graphism [2] or in living art. -
Weighted Transparency: Literal and Phenomenal
Frei Otto soap bubble model (top left), Antonio Gaudi gravity model (bottom left), Miguel Fisac fabric form concrete wall (right) Weighted Transparency: Literal and Phenomenal SPRING 2020, OPTION STUDIO VISITING ASSOCIATE PROFESSOR NAOMI FRANGOS “As soon as we adventure on the paths of the physicist, we learn to weigh and to measure, to deal with time and space and mass and their related concepts, and to find more and more our knowledge expressed and our needs satisfied through the concept of number, as in the dreams and visions of Plato and Pythagoras; for modern chemistry would have gladdened the hearts of those great philosophic dreamers.” On Growth and Form, D’Arcy Wentworth Thompson Today’s maker architect is such a dreamt physicist. What is at stake is the ability to balance critical form-finding informed by the behavior of matter itself with the rigor of precision afforded by computational thinking. This studio transposes ideas of cross- disciplinarity in design, art, science, engineering and material studies pioneered by our forerunner master-builders into built prototypes by studying varying degrees of literal and phenomenal transparency achieved through notions of weight. Working primarily with a combination of plaster/concrete and glass/porcelain, juxtapositions are provoked between solid and void, heavy and light, opaque and transparent, smooth and textured, volume and surface. How can the actual weight of a material affect its sense of mass? How can mass capture the phenomena of weightlessness? How can physical material properties dictate appearances beyond optical transparency? Using dynamic matter/flexible formwork (i.e. salt, sand, gravel, fabric), suspended/submerged and compression/ expansion systems, weight plays a major role in deriving methods of fabrication and determining experiential qualities of made artifacts. -
Study on Bubble Cavitation in Liquids for Bubbles Arranged in a Columnar Bubble Group
applied sciences Article Study on Bubble Cavitation in Liquids for Bubbles Arranged in a Columnar Bubble Group Peng-li Zhang 1,2 and Shu-yu Lin 1,* 1 Institute of Applied Acoustics, Shaanxi Normal University, Xi’an 710062, China; [email protected] 2 College of Science, Xi’an University of Science and Technology, Xi’an 710054, China * Correspondence: [email protected]; Tel.: +86-181-9273-7031 Received: 24 October 2019; Accepted: 29 November 2019; Published: 4 December 2019 Featured Application: This work will provide a reference for further simulations and help to promote the theoretical study of ultrasonic cavitation bubbles. Abstract: In liquids, bubbles usually exist in the form of bubble groups. Due to their interaction with other bubbles, the resonance frequency of bubbles decreases. In this paper, the resonance frequency of bubbles in a columnar bubble group is obtained by linear simplification of the bubbles’ dynamic equation. The correction coefficient between the resonance frequency of the bubbles in the columnar bubble group and the Minnaert frequency of a single bubble is given. The results show that the resonance frequency of bubbles in the bubble group is affected by many parameters such as the initial radius of bubbles, the number of bubbles in the bubble group, and the distance between bubbles. The initial radius of the bubbles and the distance between bubbles are found to have more significant influence on the resonance frequency of the bubbles. When the distance between bubbles increases to 20 times the bubbles’ initial radius, the coupling effect between bubbles can be ignored, and after that the bubbles’ resonance frequency in the bubble group tends to the resonance frequency of a single bubble’s resonance frequency. -
Bubble Size and Bubble Concentration of a Microbubble Pump with Respect to Operating Conditions
energies Article Bubble Size and Bubble Concentration of a Microbubble Pump with Respect to Operating Conditions Seok-Yun Jeon 1,2, Joon-Yong Yoon 1 and Choon-Man Jang 2,* 1 Department of Mechanical Engineering, Hanyang University, 55 Hanyangdeahak-ro, Sangnok-gu, Ansan, Gyeonggi-do 15588, Korea; [email protected] (S.-Y.J.); [email protected] (J.-Y.Y.) 2 Department of Land, Water and Environment Research, Korea Institute of Civil Engineering and Building Technology, 283, Goyangdae-ro, Ilsanseo-gu, Goyang-si, Gyeonggi-do 10223, Korea * Correspondence: [email protected]; Tel.: +82-31-910-0494 Received: 8 June 2018; Accepted: 12 July 2018; Published: 17 July 2018 Abstract: The present paper describes some aspects of the bubble size and concentration of a microbubble pump with respect to flow and pressure conditions. The microbubble pump used in the present study has an open channel impeller of a regenerative pump, which generates micro-sized bubbles with the rotation of the impeller. The bubble characteristics are analyzed by measuring the bubble size and concentration using the experimental apparatus consisting of open-loop facilities; a regenerative pump, a particle counter, electronic flow meters, pressure sensors, flow control valves, a torque meter, and reservoir tanks. To control the intake, and the air flowrate upstream of the pump, a high precision flow control valve is introduced. The bubble characteristics have been analyzed by controlling the intake air flowrate and the pressure difference of the pump while the rotational frequency of the pump impeller was kept constant. All measurement data was stored on the computer through the NI (National Instrument) interface system. -
Vibrations of Fractal Drums
VOLUME 67, NUMBER 21 PHYSICAL REVIEW LETTERS 18 NOVEMBER 1991 Vibrations of Fractal Drums B. Sapoval, Th. Gobron, and A. Margolina "' Laboratoire de Physique de la Matiere Condensee, Ecole Polytechnique, 91128 Palaiseau CEDEX, France (Received l7 July l991) Fractal boundary conditions drastically alter wave excitations. The low-frequency vibrations of a membrane bounded by a rigid fractal contour are observed and localized modes are found. The first lower eigenmodes are computed using an analogy between the wave and the diffusion equations. The fractal frontier induces a strong confinement of the wave analogous to superlocalization. The wave forms exhibit singular derivatives near the boundary. PACS numbers: 64.60.Ak, 03.40.Kf, 63.50.+x, 71.55.3v Objects with irregular geometry are ubiquitous in na- shown in Fig. 2. ture and their vibrational properties are of general in- The observation of confined modes was a surprise be- terest. For instance, the dependence of sea waves on the cause, in principle, the symmetry of the structure forbids topography of coastlines is a largely unanswered question. their existence. In fact, this experimental localization is The emergence of fractal geometry was a significant due both to damping and to the existence of narrow paths breakthrough in the description of irregularity [11. It has in the geometry of the membrane. If only one of the been suggested that the very existence of some of the equivalent regions like A is excited, then a certain time T, fractal structures found in nature is attributable to a called the delocalization time is necessary for the excita- self-stabilization due to their ability to damp harmonic tion to travel from A to B. -
Memoirs of a Bubble Blower
Memoirs of a Bubble Blower BY BERNARD ZUBROVVSKI Reprinted from Technology Review, Volume 85, Number 8, Nov/Dec 1982 Copyright 1982, Alumni Association of the Massachusetts Institute of Technolgy, Cambridge, Massachusetts 02139 EDUCATION A SPECIAL REPORT Memoirs N teaching science to children, I have dren go a step further by creating three- found that the best topics are those dimensional clusters of bubbles that rise I that are equally fascinating to chil• up a plexiglass tube. These bubbles are dren and adults alike. And learning is not as regular as those in the honeycomb most enjoyable when teacher and students formation, but closer observation reveals are exploring together. Blowing bubbles that they have a definite pattern: four provides just such qualities. bubbles (and never more than four) are Bubble blowing is an exciting and fruit• usually in direct contact with one another, ful way for children to develop basic in• with their surfaces meeting at a vertex at tuition in science and mathematics. And angles of about 109 degrees. And each working with bubbles has prompted me to of a bubble in the cluster will have roughly the wander into various scientific realms such same number of sides, a fact that turns out as surface physics, cellular biology, topol• to be scientifically significant. ogy, and architecture. Bubbles and soap Bubble In the 1940s, E.B. Matzke, a well- films are also aesthetically appealing, and known botanist who experimented with the children and I have discovered bubbles bubbles, discovered that bubbles in an to be ideal for making sculptures. In fact, array have an average of 14 sides.