TY - CONF AU - Kubicsek, Ferenc AU - Hegedűs, Ferenc TI - Mikrobuborékokkal történő ammóniagyártás energiaigényének vizsgálata T2 - OGÉT 2024 - XXXII. Nemzetközi Gépészeti Konferencia PB - Erdélyi Magyar Műszaki Tudományos Társaság (EMT) T3 - Nemzetközi Gépészeti Találkozó (OGÉT), ISSN 2068-1267 ; 32. PY - 2024 SP - 191 EP - 196 PG - 6 UR - https://m2.mtmt.hu/api/publication/34827649 ID - 34827649 AB - Az ammóniát napjainkban műtrágyagyártáshoz és energiahordozóként használják. Az ammóniát a több, mint százéves Haber-Bosch-eljárással gyártják, amely igen veszélyes és költséges. Célunk az ammónia gyártására egy alternatív módszer kidolgozása és energetikai szempontból történő optimalizálása. Ez azon alapul, hogy egy folyadékban lévő, nitrogént és hidrogént tartalmazó buborékokat tágítunk ki és hagyunk szabadon lengeni. Az eljárással kapcsolatos numerikus szimulációkalapján az optimális energiaigény 90,17 GJ/t volt. LA - Hungarian DB - MTMT ER - TY - JOUR AU - Csippa, Benjamin AU - Sándor, Levente AU - Závodszky, Gábor AU - Szikora, István AU - Paál, György TI - Comparison of Flow Reduction Efficacy of Nominal and Oversized Flow Diverters Using a Novel Measurement-assisted in Silico Method JF - CLINICAL NEURORADIOLOGY J2 - CLIN NEURORADIOL PY - 2024 SN - 1869-1439 DO - 10.1007/s00062-024-01404-4 UR - https://m2.mtmt.hu/api/publication/34819372 ID - 34819372 AB - The high efficacy of flow diverters (FD) in the case of wide-neck aneurysms is well demonstrated, yet new challenges have arisen because of reported posttreatment failures and the growing number of new generation of devices. Our aim is to present a measurement-supported in silico workflow that automates the virtual deployment and subsequent hemodynamic analysis of FDs. In this work, the objective is to analyze the effects of FD deployment variability of two manufacturers on posttreatment flow reduction.The virtual deployment procedure is based on detailed mechanical calibration of the flow diverters, while the flow representation is based on hydrodynamic resistance (HR) measurements. Computational fluid dynamic simulations resulted in 5 untreated and 80 virtually treated scenarios, including 2 FD designs in nominal and oversized deployment states. The simulated aneurysmal velocity reduction (AMVR) is correlated with the HR values and deployment scenarios.The linear HR coefficient and AMVR revealed a power-law relationship considering all 80 deployments. In nominal deployment scenarios, a significantly larger average AMVR was obtained (60.3%) for the 64-wire FDs than for 48-wire FDs (51.9%). In oversized deployments, the average AMVR was almost the same for 64-wire and 48-wire device types, 27.5% and 25.7%, respectively.The applicability of our numerical workflow was demonstrated, also in large-scale hemodynamic investigations. The study revealed a robust power-law relationship between a HR coefficient and AMVR. Furthermore, the 64 wire configurations in nominal sizing produced a significantly higher posttreatment flow reduction, replicating the results of other in vitro studies. LA - English DB - MTMT ER - TY - JOUR AU - Kubicsek, Ferenc AU - Kozák, Áron AU - Turányi, Tamás AU - Zsély, István Gyula AU - Papp, Máté AU - Abu Taleb Al-awamleh, Ahmad AU - Hegedűs, Ferenc TI - Ammonia production by microbubbles: a theoretical analysis of achievable energy intensity JF - ULTRASONICS SONOCHEMISTRY J2 - ULTRASON SONOCHEM PY - 2024 SN - 1350-4177 UR - https://m2.mtmt.hu/api/publication/34576564 ID - 34576564 LA - English DB - MTMT ER - TY - JOUR AU - Kubicsek, Ferenc AU - Hegedűs, Ferenc TI - Assessment of the energy efficiency of ammonia production by microbubbles JF - PERIODICA POLYTECHNICA-CHEMICAL ENGINEERING J2 - PERIOD POLYTECH CHEM ENG PY - 2024 SN - 0324-5853 UR - https://m2.mtmt.hu/api/publication/34569489 ID - 34569489 LA - English DB - MTMT ER - TY - JOUR AU - Szabó, András AU - Nagy, Péter Tamás AU - De Baets, Gilles AU - Vanierschot, Maarten AU - Paál, György TI - Stability analysis of a streaky boundary layer generated by miniature vortex generators JF - COMPUTERS AND FLUIDS J2 - COMPUT FLUIDS VL - 269 PY - 2024 PG - 23 SN - 0045-7930 DO - 10.1016/j.compfluid.2023.106123 UR - https://m2.mtmt.hu/api/publication/34351626 ID - 34351626 N1 - Funding Agency and Grant Number: NKFI Hungary [142675, CELSA/21/024]; New National Excellence Pro-gram of the Ministry for Culture and Innovation from the source of the National Research, Development and Innovation Fund; New National Excellence Program of the Ministry for Culture and Innovation from National Research, Development and Innovation Fund [UNKP-22-3-II-BME-112]; HPC Competence Center of the Governmental Agency for IT [mvgopt01] Funding text: This research was performed within the framework of NKFI Hungary 142675 project and grant No. CELSA/21/024. Andras Szabo was supported by the UNKP-22-3-II-BME-112 New National Excellence Program of the Ministry for Culture and Innovation from the source of the National Research, Development and Innovation Fund. The work used high performance computing resources, provided by HPC Competence Center of the Governmental Agency for IT grant ID mvgopt01. The authors appreciate the helpful remarks of the anonymous reviewers that substantially improved the paper. LA - English DB - MTMT ER - TY - JOUR AU - Szabó, András AU - Paál, György TI - Reused LU factorization as a preconditioner for efficient solution of the parabolized stability equations JF - COMPUTERS AND FLUIDS J2 - COMPUT FLUIDS VL - 269 PY - 2024 PG - 21 SN - 0045-7930 DO - 10.1016/j.compfluid.2023.106115 UR - https://m2.mtmt.hu/api/publication/34329623 ID - 34329623 N1 - Funding Agency and Grant Number: NKFI Hungary [142675, CELSA/21/024]; New National Excellence Program of the Ministry for Culture and Innovation from National Research, Development and Innovation Fund [UNKP-22-3-II-BME-112] Funding text: This research was performed within the framework of the NKFI Hungary 142675 project and grant No. CELSA/21/024. Andras Szabo was supported by the UNKP-22-3-II-BME-112 New National Excellence Program of the Ministry for Culture and Innovation from the source of the National Research, Development and Innovation Fund. LA - English DB - MTMT ER - TY - JOUR AU - Sándor, Levente AU - Paál, György TI - Design space exploration of flow diverter hydraulic resistance parameters in sidewall intracranial aneurysms JF - COMPUTER METHODS IN BIOMECHANICS AND BIOMEDICAL ENGINEERING J2 - COMPUT METHOD BIOMEC VL - Előzetes kiadás / Early view PY - 2024 PG - 12 SN - 1025-5842 DO - 10.1080/10255842.2023.2215369 UR - https://m2.mtmt.hu/api/publication/33871307 ID - 33871307 N1 - Funding Agency and Grant Number: Gedeon Richter Talentum Foundation; European Commission through the H2020 project" In Silico World: Lowering barriers to ubiquitous adoption of In Silico Trials" [101016503]; National Research, Development, and Innovation Fund of Hungary [TKP2021-EGA-02] Funding text: Levente Sandor and his work were supported by the Gedeon Richter Talentum Foundation in the framework of the Gedeon Richter Excellence PhD Scholarship. The study was supported by the European Commission through the H2020 project" In Silico World: Lowering barriers to ubiquitous adoption of In Silico Trials" (topic SC1-DTH-06-2020, grant ID 101016503). The study was also supported by the National Research, Development, and Innovation Fund of Hungary under Grant number TKP2021-EGA-02. LA - English DB - MTMT ER - TY - JOUR AU - Gyürki, Dániel László AU - Sótonyi, Péter AU - Paál, György TI - Central arterial pressure estimation based on two peripheral pressure measurements using one-dimensional blood flow simulation JF - COMPUTER METHODS IN BIOMECHANICS AND BIOMEDICAL ENGINEERING J2 - COMPUT METHOD BIOMEC VL - 27 PY - 2024 IS - 6 SP - 689 EP - 699 PG - 11 SN - 1025-5842 DO - 10.1080/10255842.2023.2199112 UR - https://m2.mtmt.hu/api/publication/33753876 ID - 33753876 LA - English DB - MTMT ER - TY - CHAP AU - Kubicsek, Ferenc ED - Várterész, Flóra TI - Alternatív ammóniagyártás lehetőségei szonokémiával T2 - „A jövő Te vagy” ÚNKP-s kutatások és kiválóságok a Műegyetemen PB - Budapesti Műszaki és Gazdaságtudományi Egyetem CY - Budapest SN - 9789634219132 PY - 2023 SP - 70 UR - https://m2.mtmt.hu/api/publication/34585042 ID - 34585042 LA - Hungarian DB - MTMT ER - TY - CHAP AU - Kubicsek, Ferenc AU - Hegedűs, Ferenc ED - Csüllög, Mihály ED - Mankovits, Tamás TI - Bubbles and producing ammonia T2 - Book of Abstracts from 9th International Scientific Conference on Advances in Mechanical Engineering PB - University of Debrecen CY - Debrecen SN - 9783036414454 PY - 2023 SP - 55 EP - 55 PG - 1 UR - https://m2.mtmt.hu/api/publication/34568686 ID - 34568686 LA - English DB - MTMT ER -