TY - JOUR AU - Bolló, Betti AU - Sarka, Ferenc AU - Voith, Katalin TI - Egy egyszerűsített fékmodell termikus elemzése JF - GÉP J2 - GÉP VL - 75 PY - 2024 IS - 1 SP - 19 EP - 22 PG - 4 SN - 0016-8572 UR - https://m2.mtmt.hu/api/publication/34792165 ID - 34792165 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Aghakhani, Alireza AU - Takács, Ágnes TI - Sustainable product design: Integrating DfX principle for environmental impact reduction JF - GÉP J2 - GÉP VL - 75 PY - 2024 IS - 1 SP - 55 EP - 59 PG - 5 SN - 0016-8572 UR - https://m2.mtmt.hu/api/publication/34776872 ID - 34776872 LA - English DB - MTMT ER - TY - JOUR AU - Albert, Judit AU - Takács, Ágnes TI - Új termékfejlesztési módszerek trendjei: irodalmi áttekintés JF - GÉP J2 - GÉP VL - 75 PY - 2024 IS - 1 SP - 9 EP - 14 PG - 6 SN - 0016-8572 UR - https://m2.mtmt.hu/api/publication/34776676 ID - 34776676 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Albert, Judit AU - Takács, Ágnes TI - Teherautó alváz szerkezetének végeselemes vizsgálata JF - GÉP J2 - GÉP VL - 75 PY - 2024 IS - 1 SP - 5 EP - 8 PG - 4 SN - 0016-8572 UR - https://m2.mtmt.hu/api/publication/34776530 ID - 34776530 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Lone, Showkat Ahmad AU - Raizah, Zehba AU - Saeed, Anwar AU - Vadászné Bognár, Gabriella TI - Magnetized water-based hybrid nanofluid flow over an exponentially stretching sheet with thermal convective and mass flux conditions: HAM solution JF - NANOTECHNOLOGY REVIEWS J2 - NANOTECHNOL REV VL - 13 PY - 2024 IS - 1 PG - 13 SN - 2191-9089 DO - 10.1515/ntrev-2023-0220 UR - https://m2.mtmt.hu/api/publication/34768648 ID - 34768648 AB - The boundary-layer flow on a shrinking/contracting sheet has abundant industrial applications, which include continuous glass casting, metal or polymer extrusions, and wire drawing. In this regard, the present analysis focuses the hybrid nanofluid flow on an exponentially extending sheet. The water-based hybrid nanofluid flow contains CoFe 2 O 4 and TiO 2 nanoparticles. Heat transfer rate analysis involves the utilization of the Cattaneo–Christov heat flux model. Moreover, the Brownian motion and thermophoresis effects are used in this novel work. The mathematical model is presented in the form of system of partial differential equations, which is then transformed into system of ordinary differential equations (ODEs) using the similarity variables. The system of ODEs is evaluated by homotopy analysis method. The variation in the flow profiles has been investigated using figures and tables. The conclusions demonstrate that the effect of magnetic parameter is 52% better for hybrid nanofluid flow than for the pure water. Conversely, the increasing magnetic parameter diminishes the thermal transfer rates for water, TiO 2 –H 2 O, CoFe 2 O 4 –H 2 O, and TiO 2 –CoFe 2 O 4 /H 2 O. The increasing thermophoresis parameter upsurges the thermal flow rate of nanofluids and hybrid nanofluid, while the increasing Brownian motion parameter lessens the thermal transfer rates of nanofluids and hybrid nanofluid. The increasing effect of thermophoresis parameter is 39% better for hybrid nanofluid than for the base fluid. However, the declining impression of Brownian motion factor is 48% greater for hybrid nanofluid related to pure water. LA - English DB - MTMT ER - TY - JOUR AU - Lone, Showkat Ahmad AU - Raizah, Zehba AU - Saeed, Anwar AU - Vadászné Bognár, Gabriella TI - Statistical computation for heat and mass transfers of water-based nanofluids containing Cu, Al2O3, and TiO2 nanoparticles over a curved surface JF - SCIENTIFIC REPORTS J2 - SCI REP VL - 14 PY - 2024 IS - 1 SN - 2045-2322 DO - 10.1038/s41598-024-57532-x UR - https://m2.mtmt.hu/api/publication/34753107 ID - 34753107 AB - Nanofluid is a specially crafted fluid comprising a pure fluid with dispersed nanometer-sized particles. Incorporation these nanoparticles into pure fluid results in a fluid with improved thermal properties in comparison of pure fluid. The enhanced properties of nanofluids make them highly sought after, in diverse applications, consisting of coolant of devices, heat exchangers, and thermal solar systems. In this study hybrid nanofluid consisting of copper, alumina and titanium nanoparticles on a curved sheet has investigated with impact of chemical reactivity, magnetic field and Joule heating. The leading equations have converted to normal equations by using appropriate set of variables and has then evaluated by homotopy analysis method. The outcomes are shown through Figures and Tables and are discussed physically. It has revealed in this study that Cu-nanofluid flow has augmented velocity, temperature, and volume fraction distributions than those of Al 2 O 3 -nanofluid and TiO 2 -nanofluid. Also, the Cu-nanofluid flow has higher heat and mass transfer rates than those of Al 2 O 3 -nanofluid and TiO 2 -nanofluid. LA - English DB - MTMT ER - TY - JOUR AU - Algehyne, Ebrahem A. AU - Lone, Showkat Ahmad AU - Saeed, Anwar AU - Vadászné Bognár, Gabriella TI - Analysis of the heat transfer enhancement in water-based micropolar hybrid nanofluid flow over a vertical flat surface JF - OPEN PHYSICS J2 - OPEN PHYS VL - 22 PY - 2024 IS - 1 PG - 16 SN - 2391-5471 DO - 10.1515/phys-2023-0201 UR - https://m2.mtmt.hu/api/publication/34743696 ID - 34743696 AB - This article presented micropolar hybrid nanofluid flow comprising copper and alumina nanoparticles over a flat sheet. The mixed convection phenomenon is studied under the effect of gravity. Some additional forces such as magnetic field, thermal radiation, Eckert number, heat source, and thermal slip condition are adopted in this analysis. The leading equations are transformed into dimensionless format by employing appropriate variables and then evaluated by homotopy analysis method (HAM). The obtained results are compared with published results and found a good agreement with those published results. Also, the results of HAM are compared with those of numerical method and found a good agreement as well. The fluctuations within the flow profiles are showcased utilizing figures and tables, followed by an in-depth discussion and analysis. The outcomes of this work show that the higher volume fractions of copper and alumina nanoparticles improved the hybrid nanofluid viscosity, which results in the augmenting variation in the velocity profiles. The higher volume fractions of copper and alumina nanoparticles improved the hybrid nanofluid thermal conductivity, which results in the augmenting variation in thermal distribution. The growing mixed convection factor amplifies the buoyancy force toward the stagnation point flow, which enlarges the velocity panel. The effects of hybrid nanoparticles (Cu-Al 2 O 3 /water) at the surface are smaller on friction force and larger in case of thermal flow rate when compared to the nanofluids (Cu/water and Al 2 O 3 /water). LA - English DB - MTMT ER - TY - JOUR AU - Vadászné Bognár, Gabriella AU - Mahabaleshwar, U. S. TI - Series solution for MHD fluid flow due to nonlinear accelerating surface with suction/injection JF - AIP CONFERENCE PROCEEDINGS J2 - AIP CONF PROC VL - 3034 PY - 2024 PG - 8 SN - 0094-243X DO - 10.1063/5.0195677 UR - https://m2.mtmt.hu/api/publication/34733277 ID - 34733277 LA - English DB - MTMT ER - TY - JOUR AU - Algehyne, Ebrahem A. AU - Alamrani, Fahad Maqbul AU - Saeed, Anwar AU - Vadászné Bognár, Gabriella TI - A numerical exploration of the comparative analysis on water and kerosene oil-based Cu–CuO/hybrid nanofluid flows over a convectively heated surface JF - SCIENTIFIC REPORTS J2 - SCI REP VL - 14 PY - 2024 IS - 1 SN - 2045-2322 DO - 10.1038/s41598-024-53024-0 UR - https://m2.mtmt.hu/api/publication/34547779 ID - 34547779 AB - The fluid flow over an extending sheet has many applications in different fields which include, manufacturing processes, coating, thin film decomposition, heat and mass transfer, biomedical applications, aerospace engineering, environmental science, energy production. Keeping in mind these applications, the non-Newtonian hybrid nanofluid flow comprising of Cu and CuO nanoparticles over an extending sheet is analyzed in this work. Two different base fluids called kerosene oil and water have been incorporated. The sheet is considered to be thermally convective along with zero mass flux condition. The main equations of modeled problem have been transformed to dimensionless form by using similarity variables. The designed problem is evaluated computationally by using bvp4c Matlab function. Validation of the present results is also performed. The impacts of magnetic, Brownian motion, chemical reaction, suction and thermophoresis factors are analyzed and discussed in details. The outcomes of the present investigation declare that the kerosene oil-based hybrid nanofluid flow has greater velocity and concentration profiles than that of the water-based hybrid nanofluid flow. The water-based hybrid nanofluid has greater temperature distribution than that of kerosene oil-based hybrid nanofluid flow. The streamlines of the kerosene oil-based Newtonian and non-Newtonian hybrid nanofluid flows are more stretched than water-based Newtonian and non-Newtonian hybrid nanofluid flows. LA - English DB - MTMT ER - TY - THES AU - Várkuli, Miklós Gábor TI - Ívelt fogú kúpkerekek fogfelületeinek matematikai modellezése és a modellek felhasználási lehetőségei PY - 2024 UR - https://m2.mtmt.hu/api/publication/34535723 ID - 34535723 LA - Hungarian DB - MTMT ER -