Muestras de las aleaciones 6082 A1 y 7075 A1 se sometieron a un tratamiento térmico en horno de inducción de ultraalta frecuencia (UHFIHS) a 580 ºC durante 1 min y suministro de agua al final del proceso. El envejecimiento artificial se llevó a cabo a 190 °C durante 2, 4, 6 y 8 min. En ambas aplicacio-nes, el calentamiento se llevó a cabo utilizando un sistema de inducción con una frecuencia de 900 kHz y una potencia de 2,8 kW. Para estas series y diseños de aluminio, se calcularon los costos del tratamiento térmico. Adicionalmente, se compararon los valores de dureza de las muestras de 6082 A1 y 7075 A1 envejecidas artificialmente a 190 °C durante 10 h con los métodos convencionales 540 °C durante 5 h. Los resultados de dureza de la muestra 6082 Al obtenidos en 10 h mediante métodos convencionales, tardaron sólo 8 min mediante el envejecimiento artificial con el sistema de inducción.

Climate change, global warming and drought have been on the world agenda since the first years of the 21st century. Türkiye, which has a semi-arid climate, has also experienced periodic droughts. One of the most economical and effective measures for the sustainability of water use is underground dams. An underground dam is constructed as a barrier that blocks groundwater flow to retain and store water in a porous and permeable underground environment. Although underground dams have moderate disadvantages, they are one of the most effective groundwater management methods for efficient and sustainable use of water. As in many countries, the construction of underground dams is on the agenda in Türkiye and there are many underground dams under construction. Moreover, the "Underground Dams Action Plan" (YBEP) is a project announced by the Minister of Agriculture on 22 July 2019 with the slogan "100 underground dams in honor of the 100th anniversary of the Republic of Türkiye". This article aims to emphasize underground dams as a useful tool for sustainable water management. Moreover, there is no literature and database containing statistical data on the number and location of underground dams in developed and developing countries in the world. In this article, it is aimed to make a brief review of underground dams in the world and to contribute to the literature by presenting data on the number and location of current underground dams in Türkiye. Received: 26 December 2023 | Revised: 30 May 2024 | Accepted: 12 June 2024 Conflicts of Interest The author declares that he has no conflicts of interest to this work. Data Availability Statement Data available on request from the corresponding author upon reasonable request. Author Contribution Statement Pınar Sarı Çavdar: Conceptualization, Methodology, Software, Validation, Formal analysis, Investigation, Resources, Data curation, Writing - original draft, Writing - review & editing, Visualization, Supervision, Project administration.

Pipe flow problems are important in transportation of wastewater, oil lines and supply of water. In this study, a non-Newtonian fluid model is discussed and a numerical CFD solution is presented for flow geometry. The effects on velocity, pressure, dynamic viscosity and cell Reynolds number are discussed for different parameters of flow inside the pipe. Power Law function is considered in the analyses.

In this study, flow behavior behind a breakwater was investigated for plane-based model. In the examination, straight models at different position angles were used for the breakwater. Dynamic inlet flow was used, and the wave model has been applied in commonly used two-row amplitude. The focus is on the area between the breakwater and the coastline, which is important for the use of breakwaters. The usage of Θ=+80 position angle in placement of straight breakwater gives the most suitable response. The results were discussed in detail.