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Dissertations / Theses on the topic 'Buoyancy study'

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Published: 3 June 2025

Last updated: 31 July 2025

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1

McHugh, Sean. "A theoretical and experimental study of plumes with internally-produced changes in buoyancy." Thesis, University of Cambridge, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.611281.

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2

Lucas, Marc A. "On steady and variable buoyancy forcing in the Atlantic : an idealised modelling study." Thesis, University of Southampton, 2005. https://eprints.soton.ac.uk/18666/.

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This study examines the response of the thermohaline circulation in the north Atlantic to steady and variable buoyancy forcing. The model used is a version of the MOMA model (Webb, 1996), updated to include a free surface and Gent & McWilliams mixing. The model’s resolution is coarse, 4 x4 degrees with 15 levels in the vertical. In a first instance, the model’s response to 14 different fixed thermal profiles is investigated, by systematically keeping the equator temperature fixed and then the northernmost temperature fixed. The results show that the models response differs for these two sets o

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3

Cresswell, R. W. "An experimental study of a turbulent jet in which buoyancy acts against initial momentum." Thesis, Open University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233227.

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4

Blomqvist, Claes. "Distribution of Ventilation Air and Heat by Buoyancy Forces inside Buildings : An Experimental Study." Doctoral thesis, Stockholm : Skolan för arkitektur och samhällsbyggnad, Kungliga tekniska högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10615.

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5

Iyer, Suresh Viswanathan. "Study of buoyancy induced flow and heat transfer in a cylindrical annulus with geometric perturbations /." The Ohio State University, 1998. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487953204281755.

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6

Iyi, Draco. "A study on buoyancy driven turbulent flow associated with radiation in cavities partially filled with blockages." Thesis, Northumbria University, 2013. http://nrl.northumbria.ac.uk/15246/.

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Fluid flow and heat transfer in cavities partially filled with disconnected blockages is important in the design of a wide range of industrial and engineering applications such as thermal management of indoor environments, cooling of electronic panels, drying of agricultural products, stacking of items in cold storage etc. The flows in such confined spaces develop as a result of temperature and concentration gradient which is further complicated by the interactive effects of turbulence and radiation. The aims of this research are to explore the detailed heat transfer and flow field inside cavi

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7

Zohrabian, Alfred Sorooshkani. "An experimental and theoretical study of buoyancy driven air-flow in a half-scale stairwell model." Thesis, Brunel University, 1989. http://bura.brunel.ac.uk/handle/2438/5349.

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The buoyancy-driven air flow and the associated energy transfer within a half-scale stairwell model have been investigated experimentally and theoretically. The experimental work comprised the larger part of the investigation. The stairwell model consisted of a lower and an upper compartment connected through the stairway. The recirculation of air was maintained by a continuous supply of heat in the lower compartment. Two different cases, referred to as closed and open non-sloping ceiling stairwells, were considered. In the former, the stairwell formed a closed system, and in the latter situat

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8

Chidurala, Manohar. "A Numerical Study of Unsteady Natural Convection in a Rectangular Enclosure -- The Effect of Variable Thermodynamic and Transport Properties." ScholarWorks@UNO, 2009. http://scholarworks.uno.edu/td/973.

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A two-dimensional mathematical model is adopted to investigate the development of buoyancy driven circulation patterns and temperature contours inside a rectangular enclosure filled with a compressible fluid where one of the vertical walls of the enclosure is kept at a higher temperature than the opposite one. Fluid thermodynamic and transport properties are assumed to be functions of temperature. The governing equations are discretized using second order accurate differencing for spatial and temporal derivatives and then linearized using Newton's linearization method. The resulting set of alg

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9

Meunders, Andreas [Verfasser]. "A study on buoyancy-driven flows: Using particle image velocimetry for validating the Fire Dynamics Simulator / Andreas Meunders." Wuppertal : Universitätsbibliothek Wuppertal, 2016. http://d-nb.info/1120340047/34.

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10

Wood, Christie L. (Christie Lynn). "Sensitivity study and stability analysis of the Marotzke and Stone ocean-atmosphere model under buoyancy and energy constraints." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/114115.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, 2005.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (page 44).<br>The oceanic circulation plays a significant role in earth's climate by transporting heat polewards. Here the ocean's thermohaline circulation is studied using the Marotzke and Stone four box ocean-atmosphere model under both the buoyancy constraint proposed by Stommel and the energy constraint proposed by Huang. Both a sensitivity study and stability analysis is performed. In the sensit

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11

Kline, Nathan. "An Experimental Study of Heat Transfer Deterioration at Supercritical Pressures." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/36195.

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Convective heat transfer to CO2 flowing upward in electrically heated vertical tubes at supercritical pressures was studied for wall heat fluxes q within ranges that included values corresponding to the onset of heat transfer deterioration (HTD). The inlet pressure was P = 8.35 MPa, the mass flux was in the range 200 kg/m2s ≤ G ≤ 1500 kg/m2s, and the inlet temperature was in the range 0 ◦C ≤ Tin ≤ 35 ◦C. Wall temperature measurements were collected in three tubular test sections, having inner diameters of D = 4.6, 8, and 22 mm. The abilities of three different HTD identification methods to sep

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12

Varotto, Simone. "Numerical study of thermal effect on pollutant dispersion within a street canyon." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018.

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Il fine ultimo dell' elaborato consiste nello studio della correlazione vigente fra forze di galleggiamento e fenomeni di trasporto di inquinante. Si vuole osservare l'impatto degli effetti termici all'interno di uno street canyon sulla dispersione di CO. Sono stati impiegati dei software CFD al fine di condurre delle simulazioni numeriche che garantiscano, in brevi tempi di esecuzione, risultati affidabili e facilmente graficabili. La tesi è redatta in lingua inglese e articolata in sei capitoli. Il primo tratta una valutazione complessiva dei problemi legati all'inquinamento dell'aria, i

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13

Mellor, Margaret Anne. "Mentoring: a buoyancy vest in teaching's story waters: a case study of mentoring of beginning teachers in a Queensland high school setting." Thesis, Queensland University of Technology, 1995. https://eprints.qut.edu.au/227111/1/T%28ED%29%20181_Mellor_1995.pdf.

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In this study. it is argued that mentoring can be a successful way of inducting the novice teacher into the profession. The qualitative case study of mentoring in a large Queensland high school called for the purposes of anonymity "Darlington Heights State High School" investigates five main areas of mentoring. The project looks at what mentors do, why relationships are initiated and maintained, what relationships are necessary for the mentoring to occur. the environment in which mentoring talces place and what mentors undertalce to foster the relationship. Mentors and mentees appear to

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14

O'Sullivan, Paul D. "Experimental study of single sided ventilation through a multi-configuration slotted louvre system." Thesis, Brunel University, 2018. http://bura.brunel.ac.uk/handle/2438/16416.

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Evidence based performance of novel ventilation systems in existing low energy buildings is invaluable as it provides data on the system operation in a real dynamic environment. This thesis presents the outcomes from research involving a number of experimental field studies of a single sided ventilation system installed in a single cell office space as part of a building retrofit pilot project in Cork, Ireland. The solution consists of a purpose provided, multi configuration opening, comprising a narrow slotted architectural louvre component split across a low level manual opening section and

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15

Dowd, Cody Stewart. "A Study of Centrifugal Buoyancy and Particulate Deposition in a Two Pass Ribbed Duct for the Internal Cooling Passages of a Turbine Blade." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/81181.

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In this thesis, the ribbed ducts of the internal cooling passage in turbine blading are investigated to demonstrate the effects of high speed rotation. Rotation coupled with high temperature operating conditions alters the mean flow, turbulence, and heat transfer augmentation due to Coriolis and centrifugal buoyancy forces that arises from density stratification in the domain. Gas turbine engines operate in particle laden environments (sand, volcanic ash), and particulate matter ingested by the engine can make their way into the blade internal cooling passages over thousands of operating hours

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KUBIN, ELISABETH. "Levantine intermediate and deep water formation and water mass characteristics: An Argo float study from 2000 to 2017." Doctoral thesis, Università degli Studi di Trieste, 2020. http://hdl.handle.net/11368/2961199.

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Levantine intermediate water (LIW) is formed in the Levantine Sea (Eastern Mediterranean) and spreads throughout the Mediterranean at intermediate depths, following the general circulation. The LIW, characterized by high salinity and relatively high temperatures, is one of the main contributors of the Mediterranean Overturning Circulation and influences the mechanisms of deep water formation in the Western and Eastern Mediterranean sub-basins. In this study, the LIW and Levantine deep water (LDW) formation processes are investigated using Argo float data from 2001 to 2017 in the Northwestern L

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17

Ngomesse, Mbiandou Fabiola Audrey. "Application of X-radiography to the study of the solidification microstructures formation on Earth and in microgravity." Electronic Thesis or Diss., Aix-Marseille, 2022. http://www.theses.fr/2022AIXM0028.

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La radiographie X de laboratoire a été utilisée pour étudier l'impact de la gravité sur la dynamique de formation des microstructures de solidification d’alliages affinés Al-20%pdsCu. La comparaison d’expériences de solidification effectuées dans trois configurations différentes par rapport à la gravité a d’abord été réalisée : configuration horizontale, puis verticale vers le haut et vers le bas. Des informations quantitatives ont été obtenues sur la vitesse de flottaison des grains pendant la croissance vers le haut. Au cours de la croissance vers le bas, l’influence des plumes de soluté sur

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18

Guo, Yilin. "Experimental and Numerical Study of Submerged Inclined Buoyant Jet Discharges into Stagnant Saline Ambient Water." Thesis, Université d'Ottawa / University of Ottawa, 2020. http://hdl.handle.net/10393/41578.

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Treated and untreated liquid that is discharged from industrial and desalination plants is one of the main factors that break the ecological balance and destroys aquatic habitat in lakes, rivers and coastal areas where the effluent is discharged. Positively and negatively buoyant jets are two categories of outfalls which are generated because of the destiny difference between the effluent and ambient fluid. In order to ensure minimal impact of the effluent on the environment, it is necessary to estimate the dilution of the jet and compare it with environmental regulations on the level of requi

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19

Przydrozna, Aleksandra Anna. "Filling flows induced by a convector in a room." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/277224.

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Over the last two centuries, there has been a continual evolution of how occupied rooms are heated, with inventors competing to design new heating devices. In particular, there is a wide range of convector types, which vary in shape, size, design, material, operating medium and application. With approximately 190 million convectors installed in the UK alone, the question arises regarding the dependencies on the efficiency of heat distribution through convector-induced filling flows. A standard approach to evaluate convector performance is based on the convector strength only, the implication b

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20

Li, Jizhao. "A combined experimental and computational study of buoyant jet diffusion flames." Thesis, University of Manchester, 2010. https://www.research.manchester.ac.uk/portal/en/theses/a-combined-experimental-and-computational-study-of-buoyant-jet-diffusion-flames(ee1c7b69-0b73-4bf0-af93-aa1adbecdbb3).html.

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In this work, both experimental and computational studies have been performed to investigate the flame dynamics and combustion instability of a laboratory buoyant jet diffusion flame from different prospects. The motivation behind this study was to obtain a better understanding of the dynamics of jet diffusion flames, as part of a long-term effort in achieving flexible fuel utilisation such as interchangeable fuels and achieving more effective combustion control such as better combustion efficiency.In the experimental study of jet diffusion flames, the influences of parameters such as nozzle e

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21

Sancet, Aitor. "Study of heat transfer and flow pattern in a multiphase fuel oil circular tank." Thesis, University of Gävle, University of Gävle, Department of Technology and Built Environment, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-4926.

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<p>This is a thesis work proposed by Sweco System in order to carry out a study related to the heating system of a circular fuel oil storage tank or cistern. The study tank is a 23m diameter and 18m height with a storage capacity of around 7500m3 of Eo5 heavy fuel oil. The content ought to be at a minimum storage temperature of 50ºC so that the fuel oil is fluid enough and operation labors can be adequately performed. In fact, these types of heavy fuel oils have fairly high viscosities at lower temperatures and the heating and pumping system can be compromised at temperatures below the pour po

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22

Elhimer, Medhi. "The dynamics of neutrally buoyant particles in isotropic turbulence : an experimental study." Thesis, Toulouse, INPT, 2012. http://www.theses.fr/2012INPT0049/document.

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Le but de cette étude expérimentale est de caractériser la dynamique de particules solides, à flottabilité nulle, incluse dans un écoulement turbulent isotrope en décroissance libre. Les particules utilisées sont de forme sphérique et ont un diamètre de 4 à 5 fois plus grand que l'échelle spatial de Kolmogorov de l'écoulement. De part leur taille, les particules ont également un nombre de Stokes proche de l'unité. On s'attend alors à ce que ces particules aient une dynamique différente de celle du fluide environnant. Dans cette étude, ont se propose de quantifier les différences de vitesses en

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23

Crawford, Thomas Joseph. "An experimental study of the spread of buoyant water into a rotating environment." Thesis, University of Cambridge, 2017. https://www.repository.cam.ac.uk/handle/1810/264526.

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This thesis examines previously unresolved issues regarding the fluid dynamics of the spread of buoyant water into a rotating environment. We focus in particular on the role that finite potential vorticity and background turbulence play in determining the flow properties. When water of an anomalous density enters into an oceanic basin, gravity-driven surface flows can be established as a result of the density difference. These flows are often of a sufficiently large scale that the dynamics are affected by the Coriolis force arising from the rotation of the earth. This causes the formation of a

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24

Kumar, Rajesh. "Computational study of turbulent buoyant flows using rans modelling, pans approach and les." Thesis, IIT Delhi, 2016. http://localhost:8080/xmlui/handle/12345678/7013.

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25

Yu, Yingying. "Numerical Study of the Brisbane River Plume in Moreton Bay, Australia." Thesis, Griffith University, 2011. http://hdl.handle.net/10072/365899.

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Coastal rivers that discharge freshwater, with sediment and nutrients, into the ocean often generate a buoyant river plume in the vicinity of the river mouth. The river plume, driven by river floods, has become a significant environmental issue, which may be increasing in occurrence and severity as a consequence of climate change. The excess runoff created by floods has the capacity to carry a large amount of sediment and contaminants from land-based human activities into the coastal and shelf waters. The purpose of this research was to examine the dynamic and transport characteristics of the

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26

Ahmed, Dhafar Ibrahim. "Experimental and numerical study of model gravity currents in coastal environment : bottom gravity currents." Thesis, Brest, 2017. http://www.theses.fr/2017BRES0060/document.

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Le but de ce travail de recherche est de contribuer à une meilleure compréhension de la dynamique de propagation et de la miscibilité de jets gravitaires au-dessous d’un liquide ambiant. Des expériences ont été réalisées en laboratoire à l’aide d’une plateforme expérimentale constituée d’un bassin parallélépipédique contenant de l’eau douce et d’un canal d’injection de section rectangulaire de jets gravitaires de concentration constante initiale fixée. Les calculs mathématiques et numériques sont basés sur les modèles RANS (Reynolds-Averaged Navier Stokes equations), k-ε (K-epsilon) et DCE (Di

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27

Harby, Mohamed Abd Alaal Khaled. "Experimental and Theoretical Study of the Characteristics of Submerged Horizontal Gas Jets and Vertical Plunging Water Jets in Water Ambient." Doctoral thesis, Universitat Politècnica de València, 2012. http://hdl.handle.net/10251/18065.

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En este estudio se han construido dos diferentes instalaciones para investigar primero los chorros de gas horizontales y en segundo lugar los chorros verticales de agua que impactan sobre superficies libres de fluido, también se ha desarrollado un modelo numérico integral para predecir las trayectorias de estos jets y sus parámetros más importantes, validándose con los resultados experimentales obtenidos. En la primera parte de este trabajo, se han realizado experimentos para investigar el comportamiento de chorros de gas horizontales penetrando en agua. Los resultados experimentales indicaron

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28

Chiu, Yu-ping, and 邱郁蘋. "Ergonomic Study on Buoyancy Compensator Device." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/14493945949336319612.

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碩士<br>雲林科技大學<br>工業設計系碩士班<br>98<br>Buoyancy Compensator Device (B.C.D.) is one of the most important equipments of SCUBA (Self Contained Underwater Breathing Apparatus) diving. Almost 90 % of all diving fatalities stem from human error due to various contributory factors (e.g. inexperience, overconfidence, inappropriate diving management) (Anegg, 2002). This study is to investigate how to use the buttons of Low Pressure Quick Disconnect Hose and what cause the problem. We used the viewpoint of ergonomic to solve the problems and to design the controller of B.C.D. that promoted the safety to div

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29

You, Tzung-Hau, and 游宗皓. "A Study on Energy Analysis of Buoyancy-Driven Ventilation." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/af9gb6.

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碩士<br>國立臺北科技大學<br>冷凍空調工程系所<br>98<br>In this thesis, the main issue is comparing the energy efficiency between office with buoyancy ventilation set up and without set up. buoyancy ventilation and find out the suitable program for this climate zone ventilation design. The simulation model is located in Changzhou, China Regional Office for the actual cases. Buoyancy ventilation is using the principle that the hot air will rise when the density is becoming smaller, and it will make the room ventilated. In addition to fresh indoor air quality, but also can reduce the room temperature in the office.

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Huang, Jiun-jay, and 黃俊傑. "A study of buoyancy-driven ventilation between two connection chambers and application of buoyancy-driven ventilation in a real building." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/38993133659229285641.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>98<br>The purpose of this research is to study ventilation patterns in two connection chambers which have a common interior divider and apply buoyancy-driven ventilation design in a real building. The study shows different types of ventilation in an indoor space which has various arrangements of ventilation openings. Salt water and clean water are used to simulate the buoyancy force difference in experiments. A salt water source nozzle is placed at the top of the water tank. Salt plume proceeds in the same direction as the gravity, but it is opposite to the thermal p

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31

Huang, Yin-Chen, and 黃尹貞. "The study of the children''s conceptions development about buoyancy." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/54647064720481163226.

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32

Tsai, Ren-Kai, and 蔡仁凱. "Experimental Study of Buoyancy-driven Ventilation in Buildings with Atrium." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/f4x38w.

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碩士<br>國立中央大學<br>土木工程學系<br>106<br>This study used wind tunnel experiments and tracer gas technique to investigate the natural ventilation of buildings with atrium. The study parameters included wind speed, wind direction, opening area, and different roofings on the atrium. The experimental results revealed that the wind-driven ventilation rate is proportional to the external wind speed and the opening area, and the louver on the roofing could lessen the ventilation rate. This study also developed a physical model to estimate the ventilation rates of wind- and buoyancy-driven ventilation. When A

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Tsai, Tsung-Han, and 蔡宗翰. "A study of buoyancy-driven flow in two series-connected chambers." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/7964as.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>99<br>The purpose of this research is to study ventilation patterns in two series-connected chambers. The experiment uses utilizing acrylic model with an interior divider to analyze different position and vari- ous total effective area of openings. By an interior divider, the space is divided into two same size rooms. The space has a heat source denoted as "forced-room", and the other is denoted as "unforced room". The study discusses that different types of ventilation in an indoor space which has various arrangements of ventilation openings. Salt water and flesh wa

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Lin, Ping-Jang, and 林秉融. "A Study on Buoyancy Resistance in Underground Excavation with Different Measures." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/47720733654936728947.

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碩士<br>國立中興大學<br>土木工程學系所<br>104<br>The ground in Taichung area is full of boulder and gravel layers with high water level and proper permeability. The buoyancy-resistant methods are worth studying if the gravity of building is not enough to take the buoyancy load under groundwater seepage for underground excavation. This paper aims at the study of relevant mechanical behavior of groundwater seepage on underground structure for buoyancy-resistant methods such as different embedded depth of retaining column, ground improvement, buoyancy-resistant piles and buoyancy-resistant anchors using Plaxis

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Chang, Liang-yun, and 張喨雲. "The buoyancy Study of Structures and a case study of Manhole Backfilled by CLSM." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/ngay6n.

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碩士<br>國立臺灣科技大學<br>營建工程系<br>99<br>Though the floating events in the history of modern engineering disasters often heard, it’s still difficult to prevent or deal with as fixed patterns. The impact in these disasters, the characteristics of each project and the control in the construction phase are often not completely caused by a single but a complex of factors overlapping one another that eventually trigger the outbreaks. Of course, inducing and reflecting from the actual cases are of some aid; however, the damages that have been done are not reversible. As a result, apart from case by case exp

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Karchev, Zheko. "A Study of Intermittent Buoyancy Induced Flow Phenomena in CANDU Fuel Channels." Thesis, 2009. http://hdl.handle.net/1807/18784.

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The present work focuses on the study of two-phase flow behavior called “Intermittent Buoyancy Induced Flow” (IBIF) resulting from the loss of coolant circulation in a CANDU nuclear reactor core. The main objectives are to study steam bubble formation and migration through the pressure tube and into the feeder tubes and headers, and to study the effect of pressure tube sagging on the two-phase flow behavior during IBIF. Experiments are conducted using air and water flow at atmospheric pressure to qualitatively examine the IBIF phenomena. The test showed oscillating periodic behavior in the voi

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Kumar, Ravi, and Venkatasubbaiah K. "Numerical Study on Buoyancy Induced Flow in Enclosures Connected By Horizontal Vents." Thesis, 2012. http://raiith.iith.ac.in/770/1/ME10M10.pdf.

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The buoyancy-induced flow generated by a heat source such as fire in square enclosures connected by horizontal or ceiling vent has been studied numerically. A two-dimensional laminar and turbulent natural convection flow is investigated with the buoyancy term represented by the Boussinesq approximation. The physical model consists of two enclosures connected by horizontal vent with a finite-size of heat source located centrally on the bottom wall of enclosure. The effects of vent aspect ratio and Rayleigh number on flow field characteristics in enclosures are studied in detail. The resu

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Li, Gung-Tung, and 李耕同. "The Study of Effects of Water Strider’s Leg Structure to Wettability and Buoyancy." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/39930156388051768233.

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碩士<br>國立成功大學<br>機械工程學系碩博士班<br>97<br>In present study, the contact angles has been measured both water strider’s seta and leg, and the meniscus of leg in water is also be calculated and simulated. In this paper, the simulations of seta’s cross-section are considered from the images of SEM, and building up the proper water bridge profile between setae and seta’s groove are based on the limit of pressure. Advance angle theory is applied to find the exact stagnant position of the water bridge on the laterial surface of a groove and two setae. Then show the effect of with or without the seta roug

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Chia-ChienHsieh and 謝佳蒨. "The Assessment Study on Efficiency of Pre-cooling System Underground by Thermal Buoyancy Driven." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/17664803836320152726.

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碩士<br>國立成功大學<br>建築學系碩博士班<br>100<br>This research studied on the pre-cooling system assisted by underground labyrinth and driven by thermal buoyancy to indoor environment quality in the climate of Kaohsiung, Taiwan. The concept of underground pre-cooling system is to use the constant temperature of superficial ground layer to pre-cool outdoor air before drawn to indoor spaces. The CFD model is based on the existed building equipped with underground labyrinth system in Kaohsiung. Furthermore, analyses on the CFD simulation on the performances of different scale-type of wind towers and usage patt

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Fatemiardestani, Seyediman Jr. "Experimental and numerical study of an indoor displacement ventilation system." 2013. http://hdl.handle.net/1993/16316.

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This thesis reports a new set of experimental data and presents an in-depth analysis of the flow physics of a jet stream produced by a large quarter-round corner-mounted displacement diffuser. The air velocity, temperature and turbulence intensity inside the displacement ventilation (DV) jet have been thoroughly analyzed and compared with the reported findings of previous studies and model predictions. Furthermore, thermal comfort has been analyzed using the measured data following the ASHRAE standard. This thesis also aims at establishing an accurate numerical approach for simulating the hea

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Huang, Juay Loong, and 黃瑞龍. "The study of the influence of CAL software on middle school students'''' learning of buoyancy concept." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/92606872805764036750.

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碩士<br>國立彰化師範大學<br>物理學系在職進修專班<br>91<br>The study of the influence of CAL software on middle school students'''' learning of buoyancy concept Abstract The purpose of this study was to learn the influence of a CAL software on the study of buoyancy concept. The sample students were 9th graders, who had learned the concept before, with poor understanding on the concept . The influences of the CAL software on learning achievement were studied through the data including pre-test, post-test, interview, and questionnaire. Five students with the most high pre-test scores and fiv

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鄭文彥. "The study of integrating analogical bridge into teaching buoyancy for overcoming students' misconceptions at junior high level." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/70386148604631668952.

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碩士<br>國立彰化師範大學<br>物理學系<br>95<br>The study of integrating analogical bridge into teaching buoyancy for overcoming students’ misconceptions at junior high level. Abstract By using quasi-experiment design, the main purpose of this study was investigated what kinds of buoyant misconception junior high school student have. Than I design a buoyant material which integrated analogical bridge and analogical learning cycle .The experimental group was taught with analogical bridge and analogical learning cycle integrate into buoyant materials, and control group was taught with general context books. Fi

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Hung, Chao-Yi, and 洪肇儀. "A Study on Ninth Graders’ Misconceptions of Buoyancy Based on An Online Test Embedded A Virtual Experiment." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/35106468207595881572.

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碩士<br>國立高雄師範大學<br>科學教育暨環境教育研究所<br>104<br>This research is main to find ou the misconception in ninth grade students about the buoyancy by an online test embedded a virtual experiment. Besides, this research compare the results between traditional wittten tests and traditional online tests.Researchers take the eighth grade natural science topic, buoyancy, as the topic. We combine the conception map of buoyancy and the virtual experiment to design an online test embedded a virtual experiment, traditionap wirtten tests and traditional online tests. We design three different kinds of two tier diag

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Yang, Yu-Chun, and 楊瑜君. "A Study of Teaching with Concept Substitution on Junior High School Students’ Learning and Conceptual Change on Buoyancy." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/vujqqq.

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碩士<br>國立臺灣師範大學<br>科學教育研究所<br>105<br>Based on the theory of “concept substitution,” a teaching module about buoyancy was developed. The effects of concept substitution and traditional teaching modules on conceptual change about buoyancy were investigated. Two classes of ninth graders participated in this study with the quasi-experimental design. The concept substitution teaching module was implemented in one of the classes (the experimental group, N = 19) while the traditional teaching module was administered in the other class (the comparison group, N = 21). The diagnostic pre- and post-tests,

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CHING-CHAIN, CHEN, and 陳清乾. "The influence of high vent porosity on CO2 concentration and Air Exchange Rate in kitchen－study on buoyancy effects." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/95303943738776326923.

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碩士<br>國立成功大學<br>建築學系<br>88<br>Referred to series of the indoor air quality (IAQ) in architecture environment. This study was concentrated on the effect between CO2 and screen porosities on cooking. Find out that relation between CO2 and screen porosities on cooking. Purpose 1.Using the method of experiment, find out the relation on screen porosities、CO2 and ACH on buoyancy effect. 2.Using the method of CFD simulations, find out the relation on screen porosities、CO2 and ACH on buoyancy effect. Method 1.Choose the general model in Taiwan and

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Klint, Louise Munk. "“Buoyancy – bifo and afta” : a climate change vulnerability / resilience framework for tourism – the case study of Vanuatu dive tourism." Thesis, 2013. https://vuir.vu.edu.au/21779/.

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The Earth's climate is changing. This affects physical, biological and social systems around the globe. Although it is recognised that tourism is a sector heavily affected by climate change, very little research has been undertaken on how tourism destinations/systems can adapt to climate change. Dive tourism represents a significant player in Vanuatu's economy and the country's tourism sector is highly vulnerable to climate change. Nevertheless, there is a paucity of research on climate change adaptation for tourism in the Pacific, let alone in Vanuatu. In addressing the current research gaps,

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Huang, Li-Jen, and 黃理仁. "A study of effect of learning the concepts of buoyancy for the fourth grade students by using PODE teaching strategies." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/51511336913054601255.

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碩士<br>國立臺北教育大學<br>自然科學教育學系碩士班<br>101<br>The purpose of this study was to explore the effects of achievement and attitude on learning buoyancy through the PODE (Prediction- Operation- Discussion-Explanation) strategy for fourth grade elementary school students. A quasi-experimental design was used to compare the effects of achievement and attitude between an experimental group of fifty-one students and a control group of forty-nine students in Taipei City. Quantitative data include a two-tier diagnostic test of buoyancy and an attitude scale. A descriptive, paired-samples T test and a univariat

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Chang, Ming-Jier, and 張銘傑. "Using Conception-Association Interview to Study the Second Grade Junior High School Students'' Concept of Buoyancy and Their Conceptional Structure." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/17022417855015403686.

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碩士<br>國立高雄師範大學<br>科學教育學系<br>85<br>The purpose of this study was to analyze the second grade junior high school students'' concept of buoyancy and their conceptional structureby using the conception-association interview . The analysis also compared the results of the interview with the effect based on students'' scores of tests in their concept of buoyancy and conceptional structure. The researcher attempted to develop an effective method of examining students'' concept of buoyanc

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Chi, Hsun-sun, and 紀薰順. "A Study on performance of Learning Science with POE Teaching Strategy for Junior High Students –The buoyancy unit as exemplar." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/13238439079453538472.

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碩士<br>高雄師範大學<br>物理學系<br>98<br>The main purpose of the research was to discuss the influence of “POE teaching strategy” on the learning achievements for the 8th graders in the physics and chemistry, the buoyancy unit as exemplar. Methodology is Quasi-experimental research. There are 77 students as sample come from two classes of 8th grade of a school in Chia-yi. Teaching experimental group was taught with POE strategy and control group with traditional, respectively. All of students have done the scoring by science test and pre-test about “two-tier diagnostic assessment instrument” and “motivat

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Kuo, Shin-hung, and 郭信宏. "A study on the effect of misconception of “pressure” and “buoyancy” on the related problem solving ability for the middle school students." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/7jrzk6.

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碩士<br>國立中山大學<br>教育研究所<br>94<br>Abstract The purpose of this study is to explore the effect of “pressure” and “buoyancy” misconceptions on the related problem solving ability for middle school students. The formal test was conducted upon 96 second-year middle school students in the Kaohsiung area. Both two-tier test and interview techniques were used to diagnose the students’ misconceptions about pressure and buoyancy. The A-type and B-type situation questionnaires were the two tests used in this study. The test-retest reliabilities of these two tests are 0.84 and 0.82, respectively. Every st

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