Using CFD to improve the performance of a heat exchanger from a gasifierLiliana Dumitrescu, Edmond Maican, Ioan Pavel, Cătălin Dumitrescu, Iuliana Găgeanu and Andrei PătruțE3S Web Conf., 286 (2021) 01010DOI: https://doi.org/10.1051/e3sconf/202128601010