Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Akdemir, A.O.(2)
- Baskonus, Haci Mehmet(2)
- Buldu, G.(2)
- Bulut, Hasan(2)
- Ch., Tsitouras(2)
- Dadasoglu, F.(2)
- Ekinci, A.(2)
- Han, I.(2)
- Hasar, U.C.(2)
- Karagoz, K.(2)
- Oztekin, A.(2)
- Set, E.(2)
- Simos, T.E.(2)
- Tanaydin, Mehmet Kayra(2)
- Abualsayed, M.I.(1)
- Aladailah, M.W.(1)
- Askin, A.(1)
- Bute, M.(1)
- Demlrkiran, Nizamettin(1)
- Firat, Erhan(1)
- Flrat, Erhan(1)
- Göksu, Ali(1)
- Gülsu, Mustafa(1)
- Ince, Muharrem(1)
- Kashin, I.V.(1)
- King Saud University, College of Sciences, Department of Mathematics , P. O. Box 2455, Riyadh(1)
- Koç, Dilara Altan(1)
- Muratoglu, A.(1)
- Narkhov, E.D.(1)
- Ozkan, Gokturk M.(1)
- Seyhan, Mehmet(1)
- Shirmanov, I.A.(1)
- Simos, T.(1)
- Smirnov, A.A.(1)
- Strugov, E.D.(1)
- Tanaydin, Zümra Bakici(1)
- Tashlykov, O.L.(1)
- Tsitouras, C.(1)
- Ural Federal University, Group of Modern Computational Methods, 19 Mira Street, Ekaterinburg(1)
- Volkovich, V.A.(1)
Yayınlar
- MakaleYalnız künye2024Scopus SJRQ1Aerodynamic drag improvements on a circular cylinder using passive Venturi actuators
Firat, Erhan; Seyhan, Mehmet; Ozkan, Gokturk M.
Scale-adaptive simulations (SAS) of three-dimensional flow around a circular cylinder fitted with a passive version of a novel flow control method (passive Venturi actuator, PVA) are performed at a diameter-based Reynolds number of Re = 28 000. The PVA consists of one or more narrow slits located at the top and/or bottom sides of the cylinder that connected to the throat of the axial Venturi slit in this cylinder. The main purpose of the study is to investigate the influence of divergence angle and narrow slit location relative to the axial Venturi slit on the aerodynamic performance of the cylinder. To this end, four models were designed with various PVAs. Additional models, a plain cylinder (unmodified model) and a cylinder fitted with an axial Venturi slit (model without a narrow slit), were also used for quantitative comparison. SAS predicts that an additional 5% reduction in the time-averaged drag coefficient, ⟨ C D ⟩ , was observed when two narrow slits located on the surface at an angle of ±80° from the front stagnation line were fitted to the cylinder with an axial Venturi slit. Reducing the divergence angle of the PVA leads to improvements in ⟨ C D ⟩ and root mean square of fluctuating force coefficients, C D − rms and C L − rms . It is found that a cylinder with a PVA that has two narrow slits and a divergence angle of 6° can produce a 28.6% reduction in ⟨ C D ⟩ , a 58.5% reduction in C D − rms , and an 81.2% reduction in C L − rms , when compared to the plain cylinder.
AtıfScopus4OpenAlex4
İncele - BildiriYalnız künye2022Assessment of protective properties of glasses with the application of golmium oxide against Gamma radiation
Shirmanov, I.A.; Strugov, E.D.; Aladailah, M.W.; Tashlykov, O.L.; Abualsayed, M.I.; Askin, A.; Volkovich, V.A.; Kashin, I.V.; Smirnov, A.A.; Narkhov, E.D.
An assessment of the radiation-protective parameters of glass samples with different ratios of holmium oxide Ho2O3 was carried out using a system of libraries for computer modeling of the processes of passage of elementary particles through the Geant4 substance and the NIST XCOM database. The results of calculations of the mass attenuation coefficient and the half-attenuation layer for the samples under study at the energy of gamma radiation varying from 0.122 to 1.408 MeV are presented.
- BildiriYalnız künye2018Control of fluid flow around a square prism by fluid injection at low Reynolds number
Flrat, Erhan; Tsitouras, C.; Simos, T.; King Saud University, College of Sciences, Department of Mathematics , P. O. Box 2455, Riyadh; Ural Federal University, Group of Modern Computational Methods, 19 Mira Street, Ekaterinburg
The two-dimensional wake structure behind a fixed, rigid square prism with fluid injection from the single, relatively narrow slot (h/H=0.1) has been computed at low Reynolds number (Re=ρ·U∞·H/μ=100 based on the side length of the prism and freestream velocity) using a finite volume method (FVM). Injection surface (i.e. front and rear) and injection rate (from IR=UJ/U∞=0 to 3 by 0.2 step) are the key parameters that determine the aerodynamic and flow characteristics. Two flow patterns for the prism with front jet and four flow patterns for the prism with rear jet were identified with respect to IR. Flow patterns were associated with changes in flow and aerodynamic characteristics.
AtıfOpenAlex1İncele - BildiriYalnız künye2017Removal of copper from aqueous solution using perlite
Tanaydin, Mehmet Kayra; Tanaydin, Zümra Bakici; Ince, Muharrem; Demlrkiran, Nizamettin; Akdemir, A.O.; Ekinci, A.; Han, I.; Oztekin, A.; Set, E.; Dadasoglu, F.
The wastewaters containing organic and inorganic pollutants after many industrial processes such as metal plating, mining, textile, alloy, battery and industrial chemicals, are often discharged to environment. Heavy metals among these pollutants have highly stable, toxic, non-degradable and carcinogenic characters. They affect not only ecological system, but also human health and many life forms. Therefore, these contaminants should be eliminated or reduced to allowable levels before releasing to environment. Most of heavy metals have toxic character even at low concentrations of about 0.1-0.3ppm. Treatment technologies such as filtration, ion exchange, precipitation, electrodeposition, reverse osmosis, sedimentation, and adsorption have been applied for removal of heavy metals from aqueous solutions. Adsorption is one of the most common and widely applied methods to eliminate the metal ions from waste solutions because of its simplicity and cost effectiveness. Activated carbon, clay minerals, ion exchange resins and various agricultural residues can be used as adsorbent materials in this process [1-3].
AtıfScopus1WoS1OpenAlex3İncele - BildiriAçık Erişim2017Novel wave surfaces to the fractional Zakharov-Kuznetsov-Benjamin-Bona-Mahony equation
Baskonus, Haci Mehmet; Yel, Gülnur; Bulut, Hasan; Simos, T.E.; Ch., Tsitouras
In this work, we apply the improved Bernoulli sub-equation function method to the space-time fractional Zakharov-Kuznetsov-Benjamin-Bona-Mahony equation. We obtain new travelling wave solutions to this model for values of M, n and m. We have obtained hyperbolic function solutions that describe some physical phenomena. Two- and three-dimensional surfaces of travelling wave solutions are plotted by using Wolfram Mathematica 9. At the end of this study, a conclusion is given by mentioning important findings.
AtıfScopus21WoS19OpenAlex21İncele - BildiriAçık Erişim2017New wave simulations to the (3+1)-dimensional modified Kdv-Zakharov-Kuznetsov equation
Baskonus, Haci Mehmet; Koç, Dilara Altan; Gülsu, Mustafa; Bulut, Hasan; Simos, T.E.; Ch., Tsitouras
In this study, we apply an effective method which is improved Bernoulli sub-equation function method (IBSEFM) to the (3+1)-dimensional modified KdV-Zakharov-Kuznetsov equation. It gives some new wave simulations such as complex and exponential structures. We check up whether all structures verify the (3+1)-dimensional modified KdV-Zakharov-Kuznetsov model. Then, we plot three and two dimensional surfaces of obtained solutions by using Wolfram Mathematica 9.
AtıfScopus2OpenAlex2İncele - MakaleAçık Erişim2017Scopus SJRQ2Calibration-free extraction of constitutive parameters of magnetically coupled anisotropic metamaterials using waveguide measurements
Hasar, U.C.; Buldu, G.; Bute, M.; Muratoglu, A.
A calibration-free method for extraction of electromagnetic properties of magnetically coupled anisotropic biaxial metamaterial (MM) slabs from waveguide measurements is proposed. It relies on three measurement steps (thru, empty line, and the same line arbitrarily loaded by the MM slab) to extract electromagnetic properties. It is evaluated against another calibration-dependent method for retrieval of electromagnetic properties of a MM slab constructed by C-shaped resonators. From evaluation analysis, we note that our method, as compared to the calibration-dependent method, not only accurately extracts electromagnetic properties without requiring the use of expensive calibration standards but also is reference-invariant.
AtıfScopus10OpenAlex11
İncele - BildiriYalnız künye2017Determination of optimum conditions of crystal violet dye adsorption on almond shells
Göksu, Ali; Tanaydin, Mehmet Kayra; Akdemir, A.O.; Ekinci, A.; Han, I.; Oztekin, A.; Set, E.; Dadasoglu, F.; Karagoz, K.
Almond shells are considered as agricultural waste. In this study almond shells were chosen as effective adsorbents for removing Crystal Violet (CV) from dye solutions. The experimental data was analyzed via the Langmuir, Freudlich and Tempkin isotherm models to obtain isotherm model for the system and the data shows that the Langmuir isotherm model fitted best. Also, the thermodynamics parameters such as ΔH0, ΔG0 and ΔS0 were investigated. The results of the study show that almond shells are efficient and advantageous economically for removing CV from aqueous solutions. The maximum adsorption capacity was found to be 1.1375mg/g on almond shell. Adsorption kinetic studies indicate that the adsorption data can be represented by a pseudo second order model.
AtıfScopus4WoS4OpenAlex4İncele - MakaleYalnız künye2017Scopus SJRQ2Phase-ambiguity-free and accurate permittivity determination from waveguide measurements
Hasar, U.C.; Buldu, G.
A microwave method has been proposed for accurate and unique extraction of relative complex permittivity (ϵr) of dielectric materials from 2π phase-ambiguity-free amplitude-only two-port and one-port scattering parameter measurements. Improved accuracy has been shown by the applied uncertainty analysis. For the validation of our method, ϵr of low-loss and lossy samples was extracted.
AtıfScopus2WoS2OpenAlex2İncele - DergiAIP Conference Proceedings
- DergiReview of Scientific Instruments