SIMONE GEMINI

Dottore di ricerca

ciclo: XXXII

relatore: Prof. Mauro Valorani
co-supervisore: Prof. Mauro Valorani

Titolo della tesi: Space-Time Adaptive Resolution for Reactive Flows

Multi-scale systems evolve over a wide range of temporal and spatial scales. The extent of time scales makes both theoretical and numerical analysis difficult, mostly because the time scales of interest are typically much slower than the fastest scales occurring in the system. Systems with such characteristics are usually classified as being stiff. An adaptive mesh refinement method based on the wavelet transform and the G-Scheme framework are used to achieve spatial and temporal adaptive model reduction, respectively, of physical problems described by PDEs. The combination of the methods is proposed to solve PDEs describing reaction-diffusion systems with the minimal number of degrees of freedom, for prescribed accuracies in space and time. Different reaction-diffusion systems are studied with the aim to test the performance and the capability of the combined scheme to generate accurate solutions with respect to reference ones. Several strategies are implemented to improve the performance of the scheme, with minimal loss of accuracy.

Produzione scientifica

11573/1356033 - 2019 - Numerical generation of multidimensional flamelet databases using an adaptive wavelet method

Gemini, S.; Ciottoli, P. P.; Malpica Galassi, R.; Grenga, T.; Pitsch, H.; Paolucci, S.; Valorani, M. - 04d Abstract in atti di convegno

congresso: 9th European Combustion Meeting (ECM 2019) (Lisbon; Portugal)

libro: Proceedings of the 9th European Combustion Meeting - ()

11573/1658209 - 2017 - A prospective non-randomized controlled, multicenter trial comparing appendectomy and conservative treatment for patients with uncomplicated acute appendicitis (the ACTUAA study)

Podda, M.; Serventi, F.; Mortola, L.; Marini, S.; Sirigu, D.; Piga, M.; Pisano, M.; Coppola, M.; Agresta, F.; Virdis, F.; Di Saverio, S.; Cillara, N.; Balestra, F.; Ottonello, R.; Lai, A.; Piro, S.; Argenio, G.; Gemini, S.; Pala, M.; Piras, M.; Erdas, E.; Nicolosi, A.; Gordini, L.; Podda, F.; Pisanu, A.; Atzeni, J.; Poillucci, G.; De Nisco, C.; Casciu, L.; Piano, M.; Labate, S.; Saba, L.; Aresu, S.; Azzinnaro, A.; Ioia, G.; Turri, L.; Pulighe, F.; Anania, M.; Canfora, A.; Bottino, V.; Piazza, D.; Luridiana, G.; Serra, P.; Saba, A.; Tuveri, A.; Pinna, G.; Piredda, A.; Madeddu, F.; Caneva, P. D.; Delogu, D.; Saliu, A.; Cogoni, G.; Deserra, A.; Pau, R.; Cossu, S.; Canu, L.; Marcias, G.; Garau, F.; Loi, S.; Bellisano, G.; Presenti, L.; Maccioni, A.; Norcia, G.; Piras, E.; Fiume, S.; Pitzalis, A.; Bianco, P.; Cappai, M.; Cadeddu, F. N.; Manca, A.; Occhioni, G.; Rossi, A. M.; Rizzo, S.; Centonze, M.; Portolano, V.; Barbareschi, M.; Barrasi, E.; Martorana, M.; Ferro, F.; Casarini, C.; Stella, G.; Generoso, P.; Rossi, S.; Abelli, F.; Casula, L.; Gerardi, C.; Bertele', V. - 01a Articolo in rivista

rivista: INTERNATIONAL JOURNAL OF COLORECTAL DISEASE (Springer Verlag Germany:Tiergartenstrasse 17, D 69121 Heidelberg Germany:011 49 6221 3450, EMAIL: g.braun@springer.de, INTERNET: http://www.springer.de, Fax: 011 49 6221 345229) pp. 1649-1660 - issn: 0179-1958 - wos: WOS:000412821000018 (4) - scopus: 2-s2.0-85028552368 (6)

11573/1658220 - 2017 - Laparoscopic appendectomy vs antibiotic therapy for acute appendicitis: a propensity score-matched analysis from a multicenter cohort study

Poillucci, G.; Mortola, L.; Podda, M.; Di Saverio, S.; Casula, L.; Gerardi, C.; Cillara, N.; Presenti, L.; Balestra, F.; Serventi, F.; Fiume, S.; D Lai, M. A.; Ledda, S.; Pulighe, F.; Gobbi, S.; De Nisco, C.; Argenio, G.; Norcia, G.; Gemini, S.; Sechi, R.; Pala, M.; Pau, R.; Ottonello, R.; Pisano, M.; Aresu, S.; Coppola, M.; Tuveri, A.; Madeddu, F.; Piredda, A.; Pinna, G.; Scognamillo, F.; Tilocca, P. L.; Delogu, L.; Carboni, G. M.; Porcu, G.; Piras, D. - 01a Articolo in rivista

rivista: UPDATES IN SURGERY (Milano : Springer-Verlag Italia) pp. 531-540 - issn: 2038-131X - wos: WOS:000416627700015 (15) - scopus: 2-s2.0-85034654012 (15)