WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection
Permanent URI for this collectionhttps://hdl.handle.net/11147/7150
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Article Citation - WoS: 2Citation - Scopus: 2Numerical Simulation of Flow and Dam Body Sediment Over a Movable Bed Due To an Earthfill Dam Break(Yıldız Teknik Üniversitesi, 2022) Tayfur, Gökmen; Tayfur, Gökmen; Issakhov, Alibek; Zhandaulet, Yeldos; 03.03. Department of Civil Engineering; 03. Faculty of Engineering; 01. Izmir Institute of TechnologyThis paper presents the numerical simulations of flow and dam body sediment transport over a movable bed due to an earthfill dam break. The RANS equations, together with the k-omega SST turbulent model, are employed. The phase characteristic parameter is used as the phases of air, water, sediment, and bulk of dam body. The system of equations is solved numerically using the PISO algorithm. The numerical model is first verified using the dam break experimental data from the literature. The model successfully captures the temporal changes in the measured flow depths, pressures, wave fronts, and arrival times. The ve rified mod el is then app lied to simulate the flow and sediment transport as a result of an artificial earthfill dam break having an obstacle at its downstream section. The simulations show that there is a noticeable decrease in the shock pressures at all points around the obstacle and there is an increase in the water levels. The bulk dam body sediment moves together with the water flow wh ile sp reading. It takes longer time for the sediment laden flow to reach the obstacle. The investigation of dam body formed by different soils shows that the soil type has minor effect while the transport of sediment can raise the water levels and change the morphology of the downstream section.Article Citation - WoS: 1Children in Urban Environments: a Case Study From a Dense Neighbourhood in Izmir-Turkey(Yıldız Teknik Üniversitesi, 2022) Dikmen Güleryüz, Oylum; Doğan, Fehmi; Doğan, Fehmi; Kasalı, Altuğ; 02.02. Department of Architecture; 02. Faculty of Architecture; 01. Izmir Institute of TechnologyThe aim of this study is to understand children's engagement with their urban outdoor environments in Izmir-Turkey, a city with a high urbanisation rate, and to explore the factors that affect their outdoor preferences outside of their school time. The study consists of a field study conducted in a densely populated middle-income neighbourhood. Participants are fourth-grade children from a state-run primary school aged 9-11 years (n=44) and their parents (n=40). The study followed a multi-methodological approach, employing questionnaires, drawing and story writing tasks as data collection methods. Results of the study showed the strong tendency to prefer outdoors during their free time even when their neighbourhood is a high-density urban settlement with limited opportunities for outdoor activities. In the studied neighbourhood, most of the participants mentioned the schoolyard over other locations as their preferred place fin- outdoor play. Other than the schoolyard, the children mainly reported familiar places in their neighbourhoods, close to their local environments which were also depicted in their drawings and described in their stories. From the perspectives of urban designers and policy-makers, the findings of the study highlight aspects to be concerned about opportunities for outdoor play in high-density and urbanised central neighbourhoods.Article Citation - WoS: 2Cephe Yönlenmesinin Tarihi Konutların Enerji Kullanımına Etkileri: Güneybatı Anadolu’da Dış Sofalı Konutlar(Yıldız Teknik Üniversitesi, 2022) Timur, Barış Ali; Başaran, Tahsin; İpekoğlu, Başak; Timur, Barış Ali; Başaran, Tahsin; 02.02. Department of Architecture; 01. Izmir Institute of Technology; 02.01. Department of Conservation and Restoration of Cultural Heritage; 02. Faculty of ArchitectureCephe yönlenme durumu, yapıların enerji kullanım miktarlarını etkileyen önemli bir tasarım parametresi olarak kabul edilmektedir. Bu parametre özellikle yeni yapı tasarımı alanında, yönlenme optimizasyon kararları geliştirmek üzere birçok araştırmada incelenmiştir. Buna karşılık, tarihi yapıların yönlenmesi ve enerji kullanım miktarları arasındaki ilişkiyi irdeleyen çalışmalar sınırlıdır. Bu çalışmanın amacı, Anadolu coğrafyasında yaygın bir tarihi yapı türü olan dış sofalı konutların Muğla kenti örnek yerleşmesindeki hâkim yönlenme durumları ile enerji kullanım düzeyleri arasında belirgin bir ilişki olup olmadığının araştırılmasıdır. Araştırma yöntemi, DesignBuilder v.5.4.0.21 yazılımında gerçekleştirilmiş olan yapı ısıl modellemesi ve simülasyonudur. Çalışmada, örnek bir tarihi konutun mimari özellikleri kullanılarak oluşturulmuş sanal bir yapı modelinin sofa yönlenme durumu, ana ve ara yönlere göre değiştirilerek ısıl simülasyonları gerçekleştirilmiş ve simülasyonlar sonucu hesaplanan ısıtma ve soğutma enerji ihtiyaçları karşılaştırılmıştır. Simülasyonlar, karşılaştırmalı olarak önce yapı çevresindeki kütle ve peyzaj elemanlarıyla sonra bu elemanlar olmadan iki sonuç seti için gerçekleştirilmiştir. Simülasyonlar sonucunda, örnek yapı türü için en iyi ve en verimsiz yönlenme durumları arasında enerji kullanımı açısından hesaplanan oransal farkın %1,3 ile %2,2 arasında olduğu saptanmıştır. Bu sonuca göre, örnek yapı türü enerji kullanım durumunun çok yüksek oranda yönlenmeden bağımsız olduğu, bu nedenle de örnek yerleşmedeki dış sofalı konutlar için hâkim yönlenme tercihi ile yapı enerji kullanım düzeyleri arasında dikkate değer bir ilişki olmadığı belirlenmiştir.Article Citation - WoS: 12Citation - Scopus: 11Inverted Fins for Cooling of a Non-Uniformly Heated Domain(Yıldız Teknik Üniversitesi, 2015) Çetkin, Erdal; Çetkin, Erdal; 03.10. Department of Mechanical Engineering; 03. Faculty of Engineering; 01. Izmir Institute of TechnologyThis paper shows that the peak temperature of a non-uniformly heated region can be decreased by embedding high-conductivity tree-shaped inserts which is in contact with a heat sink from its stem. The volume fraction of the high-conductivity material is fixed, and so is the volume of the solid region. The length scale of the solid domain is L. Inside there is a cube-shaped region with length scale of 0.1L and heat production 100 times greater than the rest of the domain. The location of this hot spot was varied to uncover how its location affects the peak temperature and the design of inverted fins, i.e. highconductivity tree-shaped inserts. The volume fraction of the high-conductivity tree was varied for number of bifurcation levels of 0, 1 and 2. This showed that increasing the number of the bifurcation levels decreases the peak temperature when the volume fraction decreases. The optimal diameter ratios and optimal bifurcation angles at the each junction level are also documented. Y-shaped trees promise smaller peak temperatures than T-shaped trees. The location of the vascular tree in the z direction also affects the peak temperature when the heat generation is non-uniform. In addition, the peak temperature is minimum when z = 0.65L even though the hot spot is located on z = 0.75L.Article Citation - WoS: 7İşlev değişikliğinin tarihi yapılar üzerine etkileri “Alsancak Levanten Evleri örneği”(Yıldız Teknik Üniversitesi, 2015) Gazi Gezgin, Aylin; Boduroğlu, Elvin; 01. Izmir Institute of TechnologySocial change brings with it new human needs and activities, and in every era humans create and recreate spaces, and hence structures, according to these needs and activities. This means that structures, and their parts, need to undergo change in terms of space and function to adapt to different functionalities and conditions. One understanding of preservation is based on the idea that with a change in function, historical structures which have outlived their original purpose are given new life and once again are made part of the urban landscape. Instances of functional change are most often seen in monumental and historical industrial structures, and in the examples of civil architecture remaining in areas set aside for housing settlements as a result of rapid urbanization. It is important, however, that any functional change made to a historical structure serves to protect the architectural value, meaning and memory of the structure. Alsancak is home to a large number of historical Levantine houses, many of which, following rapid urbanization in the 1970s, have had to change their function to that of bar or cafe. The main purpose of this study was to evaluate the effect of the re-functioning on these houses in Alsancak, and to make some recommendations on both the processes involved in re-functioning, and on the current legal regulations governing these processes with a view to ameliorating the negative effects of re-functioning on such structures.Article Citation - WoS: 3Citation - Scopus: 4Constructal Structures for Self-Cooling: Microvascular Wavy and Straight Channels(Yıldız Teknik Üniversitesi, 2015) Çetkin, Erdal; Çetkin, Erdal; 03.10. Department of Mechanical Engineering; 03. Faculty of Engineering; 01. Izmir Institute of TechnologyThis paper shows that a conductive domain which is subjected to heating from its bottom can be cooled with embedded microvascular cooling channels in it. The volume of the domain and the coolant are fixed. The actively cooled domain is mimicked from the human skin (which regulates temperature with microvascular blood vessels). The effect of the shape of cooling channels (sinusoidal or straight) and their locations in the direction perpendicular to the bottom surface on the peak and average temperatures are studied. In addition, the effect of pressure difference in between the inlet and outlet is varied. The pressure drop in the sinusoidal channel configurations is greater than the straight channel configurations for a fixed cooling channel volume. The peak and average temperatures are the smallest with straight cooling channels located at y = 0.7 mm. Furthermore, how the cooling channel configuration should change when the heat is generated throughout the volume is studied. The peak and average temperatures are smaller with straight channels than the sinusoidal ones when the pressure drop is less than 420 Pa, and they become smaller with sinusoidal channel configurations when the pressure drop is greater than 420 Pa. In addition, the peak and average temperatures are the smallest with sinusoidal channels for a fixed flow rate. Furthermore, the peak temperatures for multiple cooling channels is documented, and the multiple channel configurations promise to the smallest peak temperature for a fixed pressure drop value. This paper uncovers that there is no optimal cooling channel design for any condition, but there is one for specific objectives and conditions.Article Modernity, Hygiene and Display of the Body(Yıldız Teknik Üniversitesi, 2016) Yılmaz, Ebru; Yılmaz, Ebru; 02.02. Department of Architecture; 02. Faculty of Architecture; 01. Izmir Institute of TechnologyThis article focuses on health museums as a building type introduced to the architectural medium at the beginning of 20th century by modern thinking, the ideal of creating a healthy society as a guarantee of progress and development. Health museums provided representation for concepts of modernity and hygiene in a built environment by being spaces that displayed the human body and exhibits related to diseases, hygiene, and medical developments. A modest building in scale and content, the Izmir Health Exhibition building of the Izmir Fair was analyzed in this study to show how it contributed to 1920s and 1930s modern architecture in Turkey and what were the representational meanings of the messages transmitted. The existence of this building, constructed in 1937 in Izmir, should be understood in the context of health policies from all around the world, social engineering efforts, and the process of modernization. The building is an example of a use of modern architecture, but of a type that is waning in popularity in today's contemporary world. Looking back at this building today helps us understand the rising and declining value of modernity in the discourse of hygiene and its effect on the field of architecture. The contribution of the Izmir Health Exhibition building to early modern Turkish architecture is discussed with reference to similar exhibitions and museums around the world.Article Citation - WoS: 1Research of Rural Architecture in Aegean Region: Villages of Bayindir(Yıldız Teknik Üniversitesi, 2017) Akyüz Levi, Eti; Taşcı, Burcu; Taşcı, Burcu; 01. Izmir Institute of TechnologyRural architecture and settlements occupy an important place in conservation discipline. In this study, the architectural pattern of Karahayit, Gaziler, and Kabaagac-the three villages affiliated to Zeytinova, Bayindir, Izmir-is examined and evaluated, and proposals regarding the future of the villages are made. The villages are documented through field surveys and literature reviews and are evaluated in a comparative study. This study is primarily based on the field surveys that determined in-situ conditions about villages. Villages are settlements that are isolated from the center and have limited transportation possibilities. Moreover, many people migrated to cities from the villages due to limitations of education and employment, resulting in the dilapidation of many of the houses as no one live in them. Settlement has taken form in agreement with the topography; the houses have inclined towards the valley and the scenery. Olive cultivation and cattle breeding are the main sources of living. The mosque and laundry buildings are among the important buildings. It is seen that various interventions were made in the houses during the usage. The physical sustainability of the houses must be ensured in integration with sustainable social, economic, and living conditions. The following measures seem appropriate: the houses should be adapted for current living conditions; a technical contribution should be made during the repair work; and the houses should be expropriated and utilized for touristic functions. The maintenance of villages should be evaluated in the context of rural development. Furthermore, production and marketing possibilities should be developed, and welfare activities should be increased. Finally, ecotourism as a means in rural development should be considered.Article Citation - WoS: 1Hafıza Kutusu: Bir Kentsel Kolektif Bellek Deneyi(mi)(Yıldız Teknik Üniversitesi, 2017) Doğu, Tuba; Varkal Deligöz, Melis; 01. Izmir Institute of TechnologyKentsel tasarımda kullanıcı katılımına verilen önem son yıllarda tüm dünyada artış göstermektedir. Türkiye’de de gerek yerel yönetimlerin teşviği, gerekse sivil insiyatifler ve mahalle örgütlenmeleriyle kentsel mekânların şekillenmesini gözlemlemek mümkündür. Buradan yola çıkan bu çalışma, 1960’lardan bu yana İzmir Güzelyalı’da yer alan bir kültür mekânının mahalleli eliyle dönüşümünü inceler. Sözlü tarih çalışmalarına yeni bir yöntem önerisi sunar ve mahallelinin ne denli etkin olduğunu okumak adına bir hatırlama süreci kurgular. Bu kurgu, kolektif bellek üzerinden kamusal bir yerleştirme olup, anlatılar ardındaki kolektif motivasyonu inceler. Amaç, geçmişi günümüzde okuyarak, kentsel mekânlarda yeni sivil eylemlere ışık tutmaktır.Article Tipleri Yeniden Düşünmek: Mimari Tasarım Stüdyoları İçin Tip Odaklı Bir Pedagoji Önerisi(Yıldız Teknik Üniversitesi, 2020) Kasalı, Altuğ; Kasalı, Altuğ; 02.02. Department of Architecture; 02. Faculty of Architecture; 01. Izmir Institute of TechnologyMimarlık disiplini içinde farklı zaman dilimlerinde tekrarlanan bir tartışma konusu olarak karşımıza çıkan tip ve tipoloji kavramları makalenin ana konusunu oluşturur. Tasarım süreçlerine dair analitik bir kavram olarak tanımlanabilecek tip için çeşitli tanımlar bulunsa da, tasarımcıların tipleri nasıl araçsal hale getirip kullandığı farklılıklar gösterir. Bu makalede öncelikle tip üzerine birikmiş literatüre dair kısa bir döküm sunulacaktır. Ardından, farklı dönemlerde tipleri tasarım uygulamaları içerisinde ana eksene alan mimarların işlerinden bahsedilecektir. Kuram ve uygulama yaklaşımları üzerinden gidilerek, tipleri tasarım süreçleri içerisinde ana eksene alan bir tasarım stüdyosu pedagojisinin ana hatlarına yer verilecektir. Son olarak, tiplerin tasarım süreçlerindeki rolü üzerine kısa bir değerlendirme sunulacaktır.
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