Relevant bibliographies by topics / Cavity wall

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Cavity wall'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Cavity wall"

1

Xu, Gang, and Aiqun Li. "Research on the mechanical characteristics and calculation method of concrete cavity shear wall." Advances in Structural Engineering 21, no. 12 (February 15, 2018): 1840–52. http://dx.doi.org/10.1177/1369433218757761.

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A series of non-linear analyses is presented in this article investigating the differences in mechanical characteristics of the common concrete shear wall, the concrete shear wall with concealed vertical slits, and the concrete cavity shear wall under monotonic loading. The numerical analyses define monotonic capacity curves and ductility. The results indicate that reasonable matching can be achieved in stiffness, capacity, and ductility, and non-linear behavior can be improved in cavity shear wall by changing the parameters of the cavity. A theoretical model of cavity shear wall structure is proposed to estimate the lateral displacement curve and the equivalent lateral stiffness. The effectiveness of the theoretical formula was validated by the results from numerical models with different parameters. The influence of cavity parameters on equivalent lateral stiffness is discussed, and the effect of different parameters is investigated. The results indicate that equivalent lateral stiffness of the shear wall can be reduced by increasing the length or the thickness of the cavity; the cavity’s effect on squat shear walls is significantly larger than that on slender walls.
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Goyal, Ajay, M. Shokry Rashwan, M. A. Hatzinikolas, and S. Zervos. "Structural performance of cavity walls constructed with units containing sawdust and shear connected to the brick veneer." Canadian Journal of Civil Engineering 21, no. 4 (August 1, 1994): 576–84. http://dx.doi.org/10.1139/l94-059.

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A series of experiments were conducted to investigate the behaviour of walls constructed using newly developed masonry sawdust blocks. Full-scale cavity walls consisting of the new masonry block backup and burnt clay brick veneer, connected together using metal connectors, were tested under lateral loads. The effects of block unit size, height of wall, reinforcement, grout, and cavity width on the behaviour of the wall were studied. The test results showed behaviour similar to that of walls constructed with lightweight concrete masonry units. A summary of the results is presented in this paper. Key words: masonry, cavity wall, shear connector, lateral loading, stiffness, veneer, sawdust block.
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Azzouz, El Amin, and Samir Houat. "Asymmetrical Flow Driving in Two-Sided Lid-Driven Square Cavity with Antiparallel Wall Motion." MATEC Web of Conferences 330 (2020): 01009. http://dx.doi.org/10.1051/matecconf/202033001009.

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The two-dimensional flow in a two-sided lid-driven cavity is often handled numerically for the same imposed wall velocities (symmetrical driving) either for parallel or antiparallel wall motion. However, in this study, we present a finite volume method (FVM) based on the second scheme of accuracy to numerically explore the steady two-dimensional flow in a two-sided lid-driven square cavity for antiparallel wall motion with different imposed wall velocities (asymmetrical driving). The top and the bottom walls of the cavity slide in opposite directions simultaneously at different velocities related to various imposed velocity ratios, λ = -2, -6, and -10, while the two remaining vertical walls are stationary. The results show that varying the velocity ratio and consequently the Reynolds ratios have a significant effect on the flow structures and fluid properties inside the cavity.
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Zubkov, Pavel T., and Eduard I. Narygin. "The effect of viscous dissipation on natural convection in a square cavity." Tyumen State University Herald. Physical and Mathematical Modeling. Oil, Gas, Energy 5, no. 3 (October 14, 2019): 118–30. http://dx.doi.org/10.21684/2411-7978-2019-5-3-118-130.

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This article studies the natural convection of a viscous, incompressible fluid in a square cavity in a gravitational field. The temperature of vertical walls is constant. The temperature of the left wall is higher than temperature of the right wall; the horizontal walls are considered thermally insulated. The initial condition for the temperature of a fluid in a square caviry is the constant and equals the temperature of the right wall. The initial condition for the velocity is zero. We consider only those cases where the obtained flow in the cavity is laminar. All thermophysical characteristics are assumed constant, except for one when the motion equation accounts for the gravity. Mathematical model is the Boussinesq approximation but the equation of conservation of energy contains Rayleigh dissipation function.<br> In this article, the authors have researched the effect of viscous dissipation on natural convection heat transfer in square field. The results show that viscous dissipation significantly affects the heat transfer through the cavity. This problem was solved with the finite volume method by algorithm SIMPLER for Pr=1, Gr=10<sup>4</sup>, and 10<sup>−5</sup>≤Ec≤10<sup>−3</sup>.
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Calle, Klaas, Charlotte Coupillie, Arnold Janssens, and Nathan Van Den Bossche. "Implementation of rainwater infiltration measurements in hygrothermal modelling of non-insulated brick cavity walls." Journal of Building Physics 43, no. 6 (October 31, 2019): 477–502. http://dx.doi.org/10.1177/1744259119883909.

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The watertightness of solid masonry walls is generally based on the concept of buffering and afterwards drying out the absorbed rainwater. In cavity walls, on the contrary, the air layer provides a capillary break between the inner and outer leafs allowing drainage of rainwater and preventing infiltration to the interior wall surface. For assessing moisture-related risks, heat, air and moisture models have proven to be a valuable tool, but in the case of cavity walls two problems arise: the degree of water infiltration into the cavity is unknown, and no consensus is available on the method that should be used to implement these infiltrations in a simulation. For example, for the existing buildings, it is worthwhile to investigate whether injecting cavity wall insulation induces an increase or decrease in moisture-related pathologies, in contrast to adopting a fixed performance criterion for assessment. However, to complete a thorough analysis of a brick cavity wall, it is first useful to review the hygrothermal behaviour of cavity walls as it has been previously described in the literature. As such, this article provides a summary of experimental water infiltration results for cavity walls as described in the literature, discusses experimental results of four test walls subjected to four test protocols and extracts from these results the water infiltration rate for implementation in heat, air and moisture models. Finally, several methods for implementing the infiltrations in heat, air and moisture simulations are presented and evaluated based on different damage criteria. In general, the new modelling approaches are considered to provide realistic results. Nonetheless, an in situ investigation on whether mortar bridges occur in the cavity due to poor workmanship remains crucial to understanding the hygrothermal response as mortar bridges are found to have a dominant impact on the risk of mould growth at the interior wall surface.
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Harvey, Steven A. "Open-cavity and closed-cavity (intact canal wall) tympanomastoidectomy." Operative Techniques in Otolaryngology-Head and Neck Surgery 7, no. 1 (March 1996): 50–54. http://dx.doi.org/10.1016/s1043-1810(96)80062-5.

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Smith, Peter G., Malcolm H. Stroud, and Joel A. Goebel. "Soft-Wall Reconstruction of the Posterior External Ear Canal Wall." Otolaryngology–Head and Neck Surgery 94, no. 3 (March 1986): 355–59. http://dx.doi.org/10.1177/019459988609400317.

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A simple method of reconstructing a previously removed posterior ear canal with an autogenous, bilaminar membrane is described. The resulting air-filled mastoid cavity is an anatomic extension of the middle ear cleft and is separated from the ear canal by a functional barrier that is continuous with the tympanic membrane. The acoustic characteristics of an associated tympanoplasty are not significantly altered, and many of the problems that are associated with an exteriorized cavity are avoided. In contradistinction to other methods of mastoid obliteration or reconstruction, the semitransparent nature of the soft canal wall allows inspection of the underlying cavity for residual or recurrent disease. The technique can be used to repair either a newly created cavity or a previous radical (or modified radical) mastoidectomy defect. The functional results of thirty ears reconstructed in this fashion are detailed. A variable amount of soft-wall retraction was noted postoperatively in 47% of the ears; however, the long-term functional results in these cases remain satisfactory.
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Chakroun, Walid. "Effect of Boundary Wall Conditions on Heat Transfer for Fully Opened Tilted Cavity." Journal of Heat Transfer 126, no. 6 (December 1, 2004): 915–23. http://dx.doi.org/10.1115/1.1798931.

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An experimental investigation was performed to study the effect of wall conditions as well as the tilt angle on heat transfer for fully opened tilted cavity. The cavity has a rectangular shape with a square cross section. One side is fully opened to the ambient, permitting air to flow inside the cavity by virtue of buoyancy. The cavity was selected to be long enough to simulate two-dimensional natural convection. Seven cases with different wall configurations were examined: (a) three of which with only one wall heated and the other two were insulated, (b) three of which with two walls heated and the other one was insulated, and (c) a case with all walls were heated. The heated walls were maintained at constant heat flux, which correspond to a constant Grashof number of 1.3×108. In each case, the cavity was rotated over a range of ±90 deg (measured from the vertical direction) in 15 deg increments. It was concluded that tilt angle, wall configuration, and the number of heated walls are all factors that strongly affect the convective heat transfer coefficient between the cavity and the ambient air. Empirical correlations were provided to predict the average Nusselt number at different inclination angles for all seven cases. It was found that the correlations could predict the result to within 4 to 10 percent, depending on the inclination angle and the case considered.
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Pey, Yin Yin, and Leok Poh Chua. "Effects of trailing wall modifications on cavity wall pressure." Experimental Thermal and Fluid Science 57 (September 2014): 250–60. http://dx.doi.org/10.1016/j.expthermflusci.2014.05.005.

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Ahmed Kadhim Hussein, Muhaiman Alawi Mahdi, and Obai Younis. "Numerical Simulation of Entropy Generation of Conjugate Heat Transfer in A Porous Cavity with Finite Walls and Localized Heat Source." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 84, no. 2 (July 25, 2021): 116–51. http://dx.doi.org/10.37934/arfmts.84.2.116151.

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In this research, the entropy production of the conjugate heat transfer in a tilted porous cavity in respect to heat source and solid walls locations has been studied numerically. Three different cases of the cavity with finite walls thickness and heat source locations are considered in the present study. For both cases one and two, the cavity considered has a vertical finite walls thickness, while the cavity with the horizontal finite walls thickness is considered for case three. For cases one and two, the left sidewall of the cavity is exposed to heat source, whereas the rest of this wall as well as the right sidewall are adiabatic. The upper and lower cavity walls are adiabatic. For case three, the lower wall is exposed to a localized heat source, while the rest of it is assumed adiabatic. The upper wall is cold, whereas the left and right sidewalls are adiabatic. The flow and thermal fields properties along with the entropy production are computed for the modified Rayleigh number (150 ? Ram ? 1000), thermal conductivity ratio (1 ? Kr ? 10), heat source length (0.2 ? B ? 0.6), aspect ratio (0.5 ? AR ? 2) and walls thickness (0.1 ? D1 ? 0.2 and 0.1 ? D2 ? 0.2) respectively. The results show that, the maximum values of the entropy generated from fluid friction develop close to the cavity wall-fluid interfacial, while the maximum values of the entropy generated from heat transfer develop nearby the heat source region. The average Bejan number (Beav) is higher than (0.5) for cases one and two. While for case three, it was found to be less than (0.5). Also, the results show that as the modified Rayleigh number, thermal conductivity ratio, heat source length and aspect ratio increased, the fluid flow intensity in the cavity increased. While, it decreased when the walls thickness increased. From the results, it is concluded that case three gives a higher heat transfer enhancement. The obtained results are compared against another published results and a good agreement is found between them.
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Dissertations / Theses on the topic "Cavity wall"

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Lindell, Oscar, and Johan Olsson. "Calculating the dead load distribution in a cavity wall." Thesis, Malmö högskola, Fakulteten för teknik och samhälle (TS), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-20730.

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Genom historien har flera olika tegelkonstruktioner använts. På 50-talet utvecklades skalmuren som idag dominerar tegelmarknaden. En studie har utförts i ett försök att förbättra hur skalmurar ska dimensioneras. Kommersiella beräkningsmodeller som används i dagsläget resulterar i överdimensionerade skalmurar där dyra konsoler möjligtvis används i onödan. Skalmurar utsätts i princip endast för sin egentyngd och är därför huvudlasten vid dimensionering. Syftet med rapporten är att utveckla en mer korrekt metod för uträkning av egenviktens fördelning i skalmurar för att minska belastningen i murverkets svaga områden. Detta kan i sin tur göra det möjligt att konsoler inte behöver användas för att förstärka de svaga delarna. Arbetet utforskar möjligheten att använda finita elementmetoden för att beräkna egentyngdens fördelning och utförs med programmet FEM-design. De nuvarande kommersiella beräkningsmodellerna använder sig inte av finita elementmetoden och skillnaderna mellan dessa två olika utgångslägen är okända. Rapportens huvudmål är att jämföra den nya metoden som tillämpar finita element metods beräkningar gentemot den gamla metodens beräkningar. Detta utförs genom att studera ett fiktivt exempel av en skalmur som med den gamla metoden hade behövt konsoler. Resultatet visade att den nya metoden kan förbättra egentyngdens fördelning i skalmuren och konsoler kan därför undvikas i detta fall.
Throughout Sweden’s history several distinct types of masonry constructions have been used. In the late 1950s the most common masonry construction that dominates today’s market was developed. A study has been conducted in an attempt to better understand how masonry constructions are to be designed. Commercial calculation methods applied for sizing cavity walls today results in oversized constructions that are reinforced with expensive consoles. The consoles are placed in the cavity wall for supporting the masonry were it would otherwise break. A new calculation method could prove these consoles to be an unnecessary expense. A cavity wall is by principal only exposed by its own dead-load and is therefor the main load when sizing the wall. The purpose of this study is to develop a more accurate method of calculating the spread of the deadload in the cavity walls masonry. This could prove that the weaker points in the wall is not in need of reinforcement by consoles. This study will investigate the possibility to use the finite element method for the calculation of the deadloads spread inside a cavity wall. Commercial calculation methods that are used today does not use the finite element method and the differences in these two initial states are unknown.
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McCormick, Duncan. "The effect of air flow inside wall cavities on the thermal performance of cavity walls." Thesis, Glasgow Caledonian University, 2017. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.743917.

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Dayon, Matthieu. "Study of the cavity wall background in the SNO detector." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape9/PQDD_0007/MQ42605.pdf.

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Aviram, David. "The thermal properties of a variable aspect ratio cavity wall." Thesis, Kingston University, 2000. http://eprints.kingston.ac.uk/20643/.

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An experimental investigation of the thermal properties of a variable cavity wall has been conducted with the aid of a Guarded Hot Box (GHB). The main objective of the investigation was to determine the thermal trends of that exist in such a wall at different aspect ratios and internal configurations. In the course of this research effort, attention had initially focused on the suitability of the GHB as a tool for measuring building components of low thermal transmittance. Following the initial evaluation that included computational modelling of the GHB, a series of modifications were employed, which included a series of baffie plates in the Guard box area. Experimental trials have shown that these modifications culminated in a reduced thermal gradient distribution within the box and along the test wall. As a result, the test wall was subjected to a more uniform heat flux and lower peripheral heat loss. A variable cavity wall measuring 1.2m by 1.2m and 0.41m deep was the main 'focus of this study. By means of a moveable brick leaf, the aspect ratio of the cavity wall could be remotely altered during the experiment, thereby allowing immediate comparison of thermal trends without the errors that are associated with building and testing a series of individual walls of different geometric proportions. In particular, this set-up enabled an accurate comparative analysis of cavity aspect ratios over a range of 15 to 30. Lazer Doppler Anemometry (LDA) and thermal measurement on the four surfaces of the cavity wall leafs were the prime means for collating experimental data. Extensive computational modelling complemented the research, which provided important insights both prior to and following the experimental stage. The use of Computational Fluid Dynamics (CFD), while not intended for precise solutions to models of the GHB and cavity wall, was never the less instrumental in establishing trends and expanding the experimental range, once corroboration of experimental results had been achieved. The experimental and computational results show that with successive cavity closure an optimum aspect ratio is reached, where thermal resistance peaks and velocity of the convective flow is minimal. At this aspect ratio, the flow regime was found to be conductive. The main implication of this result is that decreasing aspect ratio beyond this aspect ratio, by widening the cavity, will result in increasing heat losses due to the circulation of convective currents in the cavity. Thus, it was concluded that when convection diminishes, the thermal resistance of the air cavity would rise. Further computational and experimental work on the same wall with an internal partition, corroborated the trends found during the clear cavity experiment. It was found that a centrally placed vertical partition will double the thermal resistance of the wall. Furthermore, the thermal resistance of the partition was found to equal that of one partitioned cavity, raising the possibility of eliminating cavities from wall construction The effect of mortar joints upon cavity walls, at various aspect ratios, was also investigated. Results show that a vertically sinusoidal flow pattern exists in such cavities due to the thermal bridging effect of the mortar joints. The results of this study were used for several recommendations, which deal both with design of cavity walls and Guarded Hot Box design and operation.
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Cambridge, Jason Esan. "The Sound Insulation of Cavity Walls." Thesis, University of Canterbury. Mechanical Engineering, 2012. http://hdl.handle.net/10092/7332.

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Lightweight building materials are now commonly employed in many countries in preference to heavyweight materials. This has lead to extensive research into the sound transmission loss of double leaf wall systems. These studies have shown that the wall cavity and sound absorption material placed within the cavity play a crucial role in the sound transmission through these systems. However, the influence of the wall cavity on the sound transmission loss is not fully understood. The purpose of this research is to obtain a comprehensive understanding of the role played by the wall cavity and any associated sound absorption material on the sound transmission loss through double leaf wall systems. The research was justified by the fact that some of the existing prediction models do not agree with some observed experimental trends. Gösele’s theory is expanded and used in the creation of an infinite and finite vibrating strip model in order to acquire the desired understanding. The sound transmission loss, radiated sound pressure and directivity of double leaf systems composed of gypsum boards and glass have been calculated using the developed model. A method for calculating the forced radiation efficiency has also been proposed. Predictions are compared to well established theories and to reported experimental results. This work also provides a physical explanation for the under-prediction of the sound transmission loss in London’s model; explains why Sharp’s model corresponds to Davy’s with a limiting angle of 61° and gives an explanation for Rindel’s directivity and sound transmission loss measurements through double glazed windows. The investigation also revealed that a wide variety of conclusions were obtained by different researchers concerning the role of the cavity and the properties of any associated sound absorption material on the sound transmission loss through double wall systems. Consequently recommendations about the ways in which sound transmission through cavity systems can be improved should always be qualified with regard to the specific frequency range of interest, type of sound absorption material, wall panel and stud characteristics.
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Bell, P. "Heat and moisture transfer through cavity wall constructions under simulated winter conditions." Thesis, University of Salford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374500.

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Liu, Yao. "Heat transfer process between polymer and cavity wall during injection molding." Doctoral thesis, Universitätsbibliothek Chemnitz, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-157361.

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Injection molding is one of the most commonly applied processing methods for plastic components. Heat transfer coefficient (HTC), which describes the heat conducting ability of the interface between a polymer and cavity wall, significantly influences the temperature distribution of a polymer and mold during injection molding and thus affects the process and quality of plastic products. This thesis focuses on HTC under diverse processing situations. On the basis of the heat conducting principle, a theoretical model for calculating HTC was presented. Injection mold specially used for measuring and calculating HTC was designed and fabricated. Experimental injection studies under different processing conditions, especially different surface roughness, were performed for acquiring necessary temperature data. The heat quantity across the interface and HTC between a polymer and cavity wall was calculated on the basis of experimental results. The influence of surface roughness on HTC during injection molding was investigated for the first time. The factors influencing the HTC were analyzed on the basis of the factor weight during injection molding. Subsequently FEM (Finite element method) simulations were carried out with observed and preset value of HTC respectively and the relative crystallinity and part density were obtained. In the comparison between results from simulation and experiment, the result calculated with observed HTC shows better agreement with actually measured value, which can verify the reliability and precision of the injection molding simulation with observed HTC. The results of this thesis is beneficial for understanding the heat transfer process comprehensively, predicting temperature distribution, arranging cooling system, reducing cycle time and improving precision of numerical simulation
Das Spritzgießen ist eines der am häufigsten angewandten Verarbeitungsverfahren zur Herstellung von Kunststoffkomponenten. Der Wärmedurchgangskoeffizient (WDK), welcher den Wärmeübergang zwischen Kunststoff und Werkzeugwand beschreibt, beeinflusst während des Spritzgießens maßgeblich die Temperaturverteilung im Bauteil und dem Werkzeug und folglich den Prozess und die Qualität der Kunststoffprodukte. Der Inhalt dieser Arbeit beschäftigt sich mit dem WDK unter verschiedenen Prozessbedingungen. Auf Grundlage des Wärmeleitungsprinzips wurde ein theoretisches Modell für die Berechnung des WDK vorgestellt. Es wurde dazu ein Spritzgießwerkzeug konstruiert und hergestellt, welches Messungen zur späteren Berechnung des WDK ermöglicht. Praktische Spritzgießversuche unter verschiedenen Prozessbedingungen, insbesondere unterschiedlicher Oberflächenrauheit, wurden für die Erfassung der erforderlichen Temperaturdaten durchgeführt. Auf Grundlage der experimentellen Ergebnisse wurde der Wärmeübergang zwischen dem Polymer und der Werkzeugwand berechnet. Der Einfluss der Oberflächenrauhigkeit auf den WDK wurde hierbei zum ersten Mal untersucht. Auf Grundlage des Bauteilgewichtes wurden anschließend die Faktoren, die den WDK beeinflussen, berechnet. Des Weiteren wurden FEM-Simulationen (Finite Element Methode) mit dem gemessenen und dem voreingestellten WDK durchgeführt und daraus der Kristallinitätsgrad und die Bauteildichte gewonnen. Der Vergleich zwischen den realen Ergebnissen und der Simulation zeigt, dass die Berechnungen mit dem gemessenen WDK eine bessere Übereinstimmung mit den realen Werten aufweist, was die Zuverlässigkeit und Präzision der Spritzgusssimulation bestätigt. Die Ergebnisse dieser Arbeit tragen zum umfassenden Verständnis des Wärmeübergangs im Spritzgießprozess, zur Vorhersage der Temperaturverteilung, zur Auslegung des Kühlsystems, zur Reduzierung der Zykluszeit und zur Verbesserung der Genauigkeit der numerischen Simulation bei
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Liu, Yao. "Heat transfer process between polymer and cavity wall during injection molding." Doctoral thesis, Universitätsverlag der Technischen Universität Chemnitz, 2014. https://monarch.qucosa.de/id/qucosa%3A20165.

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Injection molding is one of the most commonly applied processing methods for plastic components. Heat transfer coefficient (HTC), which describes the heat conducting ability of the interface between a polymer and cavity wall, significantly influences the temperature distribution of a polymer and mold during injection molding and thus affects the process and quality of plastic products. This thesis focuses on HTC under diverse processing situations. On the basis of the heat conducting principle, a theoretical model for calculating HTC was presented. Injection mold specially used for measuring and calculating HTC was designed and fabricated. Experimental injection studies under different processing conditions, especially different surface roughness, were performed for acquiring necessary temperature data. The heat quantity across the interface and HTC between a polymer and cavity wall was calculated on the basis of experimental results. The influence of surface roughness on HTC during injection molding was investigated for the first time. The factors influencing the HTC were analyzed on the basis of the factor weight during injection molding. Subsequently FEM (Finite element method) simulations were carried out with observed and preset value of HTC respectively and the relative crystallinity and part density were obtained. In the comparison between results from simulation and experiment, the result calculated with observed HTC shows better agreement with actually measured value, which can verify the reliability and precision of the injection molding simulation with observed HTC. The results of this thesis is beneficial for understanding the heat transfer process comprehensively, predicting temperature distribution, arranging cooling system, reducing cycle time and improving precision of numerical simulation.
Das Spritzgießen ist eines der am häufigsten angewandten Verarbeitungsverfahren zur Herstellung von Kunststoffkomponenten. Der Wärmedurchgangskoeffizient (WDK), welcher den Wärmeübergang zwischen Kunststoff und Werkzeugwand beschreibt, beeinflusst während des Spritzgießens maßgeblich die Temperaturverteilung im Bauteil und dem Werkzeug und folglich den Prozess und die Qualität der Kunststoffprodukte. Der Inhalt dieser Arbeit beschäftigt sich mit dem WDK unter verschiedenen Prozessbedingungen. Auf Grundlage des Wärmeleitungsprinzips wurde ein theoretisches Modell für die Berechnung des WDK vorgestellt. Es wurde dazu ein Spritzgießwerkzeug konstruiert und hergestellt, welches Messungen zur späteren Berechnung des WDK ermöglicht. Praktische Spritzgießversuche unter verschiedenen Prozessbedingungen, insbesondere unterschiedlicher Oberflächenrauheit, wurden für die Erfassung der erforderlichen Temperaturdaten durchgeführt. Auf Grundlage der experimentellen Ergebnisse wurde der Wärmeübergang zwischen dem Polymer und der Werkzeugwand berechnet. Der Einfluss der Oberflächenrauhigkeit auf den WDK wurde hierbei zum ersten Mal untersucht. Auf Grundlage des Bauteilgewichtes wurden anschließend die Faktoren, die den WDK beeinflussen, berechnet. Des Weiteren wurden FEM-Simulationen (Finite Element Methode) mit dem gemessenen und dem voreingestellten WDK durchgeführt und daraus der Kristallinitätsgrad und die Bauteildichte gewonnen. Der Vergleich zwischen den realen Ergebnissen und der Simulation zeigt, dass die Berechnungen mit dem gemessenen WDK eine bessere Übereinstimmung mit den realen Werten aufweist, was die Zuverlässigkeit und Präzision der Spritzgusssimulation bestätigt. Die Ergebnisse dieser Arbeit tragen zum umfassenden Verständnis des Wärmeübergangs im Spritzgießprozess, zur Vorhersage der Temperaturverteilung, zur Auslegung des Kühlsystems, zur Reduzierung der Zykluszeit und zur Verbesserung der Genauigkeit der numerischen Simulation bei.
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9

Xu, Guojung. "Study of thin-wall injection molding." Connect to this title online, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1078788946.

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Thesis (Ph. D.)--Ohio State University, 2004.
Title from first page of PDF file. Document formatted into pages; contains xxi, 238 p.; also includes graphics Includes bibliographical references (p. 231-238). Available online via OhioLINK's ETD Center
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Karan, Kanioar [Verfasser]. "Demonstration of a Dual Cavity Configuration for next Generation Light-Shining-Through-a-Wall Experiments / Kanioar Karan." Hannover : Gottfried Wilhelm Leibniz Universität, 2021. http://d-nb.info/1235138518/34.

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Books on the topic "Cavity wall"

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Arora, S. K. The spacing of wall ties in cavity walls. Watford: Building Research Establishment, 1986.

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Large, K. R. Design of a novel cavity wall blow moulding process. Manchester: UMIST, 1990.

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Quirouette, R. L. Testing rainscreen wall and window systems: The cavity excitation method. Ottawa: Canada Mortgage and Housing Corporation, 1996.

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Bell, Paul. Heat and moisture transfer through cavity wall constructions under simulated winter conditions. Salford: Universityof Salford, 1986.

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Ford, R. W. Improved standards of insulation in cavity walls with an outer leaf of facing brickwork. Windsor: Brick Development Association, 1990.

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Institution, British Standards. Thermal insulation of cavity walls using man-made mineral fibre batts (slabs). London: B.S.I., 1986.

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Office, Energy Efficiency. Energy efficiency in new housing: Detailing for designers and professionals external cavity walls. London: Department of the Environment, 1993.

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Office, Energy Efficiency. Energy efficiency in new housing: Site practice for tradesmen external walls injected cavity insulation. London: Department of the Environment, 1993.

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Ford, R. W. Improved standards of insulation in cavity walls with an outer leaf of facing brickwork. Windsor: Brick Development Association, 1990.

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Burkholder, R. J. Electromagnetic fields backscattered from an S-shaped inlet cavity with an absorber coating on its inner walls. Columbus, Ohio: The Ohio State University, 1987.

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Book chapters on the topic "Cavity wall"

1

Arnoldner, Christoph, Vincent Y. W. Lin, and Joseph M. Chen. "Canal Wall Down (Radical Cavity)." In Manual of Otologic Surgery, 37–38. Vienna: Springer Vienna, 2014. http://dx.doi.org/10.1007/978-3-7091-1490-2_8.

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Navarro, João A. C., João de Lima Navarro, and Paulo de Lima Navarro. "Lateral Wall of the Nasal Cavity." In The Nasal Cavity and Paranasal Sinuses, 37–53. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-642-56829-9_4.

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Dhillon, Ramindar S., and James W. Fairley. "The anterior wall of the tympanic cavity." In Multiple-choice Questions in Otolaryngology, 6. London: Palgrave Macmillan UK, 1989. http://dx.doi.org/10.1007/978-1-349-10805-3_8.

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Bertolini, Giovanna. "The Peritoneal Cavity, Retroperitoneum, and Abdominal Wall." In Body MDCT in Small Animals, 225–46. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-46904-1_10.

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Maurya, Praveen Kumar, C. Rajeev, R. R. Vinil Kumar, and Aravind Vaidyanathan. "Effect of Aft Wall Offset on Supersonic Flow over Cavity." In Fluid Mechanics and Fluid Power – Contemporary Research, 43–51. New Delhi: Springer India, 2016. http://dx.doi.org/10.1007/978-81-322-2743-4_5.

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Goldstraw, P. "Cancer of the Respiratory Tract, Pleural Cavity, Mediastinum, and Chest Wall." In Surgical Oncology, 495–513. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-72646-0_48.

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Anas, S. M., and Mehtab Alam. "Air-Blast Response of Free-Standing: (1) Unreinforced Brick Masonry Wall, (2) Cavity RC Wall, (3) RC Walls with (i) Bricks, (ii) Sand, in the cavity: A Macro-Modeling Approach." In Lecture Notes in Civil Engineering, 921–30. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-80312-4_78.

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Ovando-Chacon, Guillermo E., Sandy L. Ovando-Chacon, Juan C. Prince-Avelino, Eslí Vázquez-Nava, and José A. Ortiz-Martínez. "Numerical Simulation of an Open Cavity with Heating in the Bottom Wall." In Fluid Dynamics in Physics, Engineering and Environmental Applications, 301–7. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-27723-8_26.

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Dutta, Subhasree, and Somnath Bhattacharyya. "Mixed Convection in a Lid-Driven Inclined Cavity with Discrete Heater on the Lower Wall." In Mathematical Modeling and Computational Tools, 193–209. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3615-1_13.

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Luo, K. H., and X. Zhou. "Large-Eddy Simulation of Variable-Density Turbulent Flows Impinging on Wall Plates and Cavity Enclosures." In Direct and Large-Eddy Simulation IV, 245–52. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-017-1263-7_30.

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Conference papers on the topic "Cavity wall"

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Murray, Nathan, and Lawrence Ukeiley. "Wall Pressure Modes in Subsonic Cavity Flows." In 11th AIAA/CEAS Aeroacoustics Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2005. http://dx.doi.org/10.2514/6.2005-2801.

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Wiles, C. "479. Novel Nondestructive Wall Cavity Sampling Case Study." In AIHce 1999. AIHA, 1999. http://dx.doi.org/10.3320/1.2763351.

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Peterson, David M., and Ez Hassan. "Modeling of Turbulence in a Supersonic Wall Cavity." In 51st AIAA/SAE/ASEE Joint Propulsion Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2015. http://dx.doi.org/10.2514/6.2015-4204.

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Kashani, Reza. "Control Modeling of Flexible Wall Cavity Vibroacoustic Systems." In ASME 2003 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/detc2003/vib-48555.

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Vibroacoustic modeling of an enclosure with flexible walls is discussed. The block-diagram modeling method is based on formulating the modal parameters of the cavity with rigid walls and the structure with no fluid interaction, i.e. in-vacuo. Having the uncoupled modal models, the rigid wall cavity and in-vacuo structural modal are coupled, “in modal domain”, in a feedback manner. In addition to being computationally efficient, this modeling technique offers a very convenient platform, especially in block diagram based modeling softwares such as Simulink, for synthesis and analysis of active sound control in vibroacoustic systems. It allows for easy access to acoustic (pressure) or structural (acceleration/strain) variables for feedback or feedforward control purposes using structural (force/moment) or acoustic (volume velocity) actuation.
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Savov, S. V., and H. D. Hristov. "Analysis of Round Cavity Antenna with Perforated Radiation-Wall." In 20th European Microwave Conference, 1990. IEEE, 1990. http://dx.doi.org/10.1109/euma.1990.336288.

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Ye, A. Ran, Rajarshi Das, and Heuy Dong Kim. "Transonic and Supersonic Flows Past a Rectangular Cavity on Curved Wall." In ASME/JSME/KSME 2015 Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/ajkfluids2015-13407.

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Investigations into cavity flows have been conducted for noise/vibration problem created in cavity system. The cavity system has been applied in engineering devices during rapid development of aerospace industry. Cavity on a curved wall has been seldom studied to the author’s best of knowledge. In the present study, the effects of channel shape on the cavity flow field on transonic and supersonic flow is investigated numerically. Time-dependent cavity flow characteristics with oscillating features were examined by using two-dimensional, mass-averaged Navier–Stokes computation based on a finite volume scheme. The results show that pressure loading on the cavity floor is observed to increase with increase in channel curvature for concave channels and decrease for convex channels. Drag in the flow channel increased as channel curvature increased. Unsteady flow characteristics are observed to be more dependent on channel curvature at supersonic free stream velocities.
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Bastien, Diane, and Martin Winther-Gaasvig. ""Hygrothermal Performance of a Hygroscopic and Permeable Wall Assembly: Impact of a Vented Wall Cavity"." In 7th International Building Physics Conference. Syracuse, New York: International Association of Building Physics (IABP), 2018. http://dx.doi.org/10.14305/ibpc.2018.be-9.02.

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Tu, Nan, Jinjia Wei, and Jiabin Fang. "Selection of Surface Reflectivity for a Solar Cavity Receiver." In ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting collocated with the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/fedsm2014-21331.

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The thermal performance of a saturated steam solar cavity receiver was numerically studied. In order to improve the uniformity of heat flux and wall temperatures on the boiling tubes, the proper selection method of the surface reflectivity for the boiling tubes and the other cavity walls was found. The uniform surface reflectivity of the boiling tubes can only obtain the highly non-uniform heat flux and wall temperature distributions. When the surface reflectivity of the boiling tubes is selected according to the non-uniform distribution of heat flux, the wall temperatures and the heat flux on the boiling tubes appear much more uniform. And when the surface reflectivity of the other cavity walls is selected as high as possible, the thermal efficiency of the receiver would be improved. Meanwhile, the increasing surface reflectivity of the cavity walls has slight effect on the heat flux and wall temperature distributions of the boiling tubes.
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Franco, Admilson Texeira, and Marcelo M. Ganzarolli. "Numerical Simulation of a Thermally-Driven Open Cavity With a Shrouding Wall." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-13233.

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Natural convection in a square open cavity with and without the presence of a shrouding wall is analyzed. One vertical wall is heated and the horizontal walls are adiabatic. The other vertical wall is open to the ambient or a fluid reservoir. A shrouding wall is placed in front of this open wall forming a vertical open channel. Laminar and two-dimensional flow is assumed for the Rayleigh number ranging from 103 to 107 and the problem is solved numerically by using the Finite Volume-SOLA method. The average Nusselt number is reported for different values of the Rayleigh number and the distance of the shrouding wall to the open cavity.
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Wagner, Justin L., Katya M. Casper, Steven J. Beresh, Brian O. Pruett, Russell Spillers, and John Henfling. "Mitigation of Wind Tunnel Wall Interactions in Subsonic Cavity Flows." In 32nd AIAA Applied Aerodynamics Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2014. http://dx.doi.org/10.2514/6.2014-3026.

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Reports on the topic "Cavity wall"

1

Wiehagen, J., and V. Kochkin. High-R Walls for Remodeling: Wall Cavity Moisture Monitoring. Office of Scientific and Technical Information (OSTI), December 2012. http://dx.doi.org/10.2172/1060618.

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Wiehagen, J., and V. Kochkin. High-R Walls for Remodeling. Wall Cavity Moisture Monitoring. Office of Scientific and Technical Information (OSTI), December 2012. http://dx.doi.org/10.2172/1219851.

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Howe, Michael S. Wall-Cavity Aeroacoustics at Low Mach Number. Fort Belvoir, VA: Defense Technical Information Center, January 2004. http://dx.doi.org/10.21236/ada419580.

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Ge, L. Adaptive Mesh Refinement for High Accuracy Wall Loss Determination in Accelerating Cavity Design. Office of Scientific and Technical Information (OSTI), June 2004. http://dx.doi.org/10.2172/827003.

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Li, Kuichun, Masaki Ido, Yoichi Ogata, Keiya Nishida, Baolu Shi, and Daisuke Shimo. Effect of Spray/Wall Interaction on Diesel Combustion and Soot Formation in Two-Dimensional Piston Cavity. Warrendale, PA: SAE International, October 2013. http://dx.doi.org/10.4271/2013-32-9021.

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