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The paper examines the washing behavior of fabric by using the finite element method (FEM) along with the Coupled Eulerian–Lagrangian (CEL) approach. Many prototypes of e-textiles with different functions have been developed for various applications in laboratories worldwide, but only a limited number of products exist on the market. The washing process, even for mild wash cycles, damages mainly conductive yarns and electrical contacts on wearable fabrics. A hydrodynamic simulation method is proposed to investigate the mechanical response of fabric during a washing cycle, using the FEM and CEL approaches with the Abaqus finite element solver. The FEM is described with the following inputs: the fabric properties; the Mie–Grüneisen equation of state (EOS) for water; the ideal gas EOS for air; the geometry of the model; the drum spin data; and the boundary conditions. The movement of fabric inside the drum and reaction forces on the drum are utilized to verify the simulations. The fabric movements that are attributed to be the reason for damage in a conductive yarn showed a typical washing response. The frictional dissipation energy results show different regions depending on the motion and interaction of the components inside the drum. Also, the contact forces were determined. These forces can be input for future damage modeling studies. The findings of the study are expected to be used in development phases of reliable e-textile products with an extended life of service and readiness for the market.

The aim of this research is to find out how activity-based digital storytelling affects the writing and digital storytelling-making skills of gifted students. In this research, which is designed as an action research, the researcher was the practitioner and also the conductor of the research. The research was conducted in the first semester of the 2018-2019 academic year in the Science and Art Center, where talented students were studying. The study group consists of 7 gifted third-grade students who continue the support education program. The implementation of the action plan took 10 weeks. The data were collected by Student Information Form, 6 + 1 Analytical Writing and Evaluation Scale, Digital Storytelling Evaluation Rubric, interview forms, researcher and student diary. According to the results of the study, the action plan applied improved the writing skills of the students. It was observed that the writing skills of the students improved according to the scores of the students during the pre-evaluation and final evaluation and application process. It was seen that the digital story formation skills of the students improved during the pre-evaluation and final evaluation and application process. According to the opinions of the students, it was determined that with the activity-based digital storytelling activities, the students learned how to write the text types, they liked writing and they found the studies entertaining and these studies improved their writing skills. In addition, it was that writing activities make writing easier, develop imagination, and digital storytelling studies also helped to see and correct errors in writing, and to write more attentive and carefully. In this study, in which action research was used, as the results are not generalized, the activity-based digital storytelling studies can be applied with different methods and the results can be investigated. Additionally, application oriented research can be increased to improve the writing skills of gifted students.<p> </p><p><strong> Article visualizations:</strong></p><p><img src="/-counters-/edu_01/0567/a.php" alt="Hit counter" /></p>

M ultiphase flows are used in a wide range of industrial applications such as heat exchangers, nuclear reactors, food production, chemical processes, and electronic cooling. It is important to understand, model and simulate multiphase phenomena such as boiling, for cooling technology.In boiling systems, a large amount of heat is transferred from the surface within small temperature differences between the surface and saturation temperature of the fluid. Although there are many experimental, computational and analytical studies on boiling phenomena, its highly complex physical mechanism hasn't been clarified yet. In recent years, bubbling characteristics have been observed visually on several surface materials with various surface properties such as roughness, cavity size, shape, and spacing. Zhang and Shoji (2003), made experiments on a silicon surface (15 mm diameter, 0.2 mm thickness) with distilled water [1]. They worked on cylindrical artificial cavities (10 µm diameter and 80 µm depth) arranged as single or twin cavities with 1, 2, 3, 4, 6 and 8 mm spacing. The bubbling behavior is recorded with a high-speed camera and temperature fluctuations beneath and around the cavities are measured with radiation thermometers. According to their observation and analysis, three significant factors involving nucleation site interactions are determined: hydrodynamic interaction between bubbles; thermal interaction between nucleation sites;