【学术报告】 ～～～～～～～～～～～～～～～～...Reporting Title: Two-fluid MHD simulations of the partially-ionized solar atmosphereSpeaker: Blajej Kuzma, Ph.D.Speaker's Institution: Harbin Institute of Technology (Shenzhen)Language of Presentation: EnglishPresentation Time: July 7, 2023 (Friday), 10:00 - 12:00Presentation Location: Room No.502, Building No.1Summary Abstract：The solar atmosphere below the transition region is partially-ionized only with the photosphere and lower chromosphere being dominated by neutrals. The impact of the latter has usually been overlooked in most single-fluid MHD work Here we present a series of novel numerical studies focused exclusively on two-fluid effects Our model uses a two-fluid model of partially ionized plasma, in which ions and neutrals are treated as separate fluids coupled through ion-neutral collisions These collisions play significant role in wave damping and plasma heating in wide range of solar phenomena It leads to significant energy dissipation in case of magneto acoustic and Alfvén waves, as well as is altering the propagating wave periods It also alters the evolution of jets spicules and flaring loops Here we show that such events substantial amount of neutrals decouples from ions leaks out changing composition ambient coronal plasma Moreover we show impact neutrals even at spatial scales large those used to model global solar corona Here despite very low concentration neutrals still affect flowfield limited but non-negligible extent (up to 5-10% locally) higher impact seen maximum solar activityThis notice can also be viewed on Cloud Academy Report Website:http://www.ynao.cas.cn/xwzx/xstg/For colleagues who wish to apply for arranging academic reports please refer to Cloud Academy Report Management Measures:http://www.ynao.cas.cn/xwzx/xstg/gzzd/Cloud Academy Invitation Group:FASOT Research Team,Yunnan Astronomical Observatory Youth Promotion CommitteeSmall GroupContact Person for Inviting Party：Qu Zhongquan & Deng LinhuaJuly 6