<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><div><span><font face="HelveticaNeue">Dear Soft Matter & Complex Systems Colleagues and Friends,</font></span></div><div><span><font face="HelveticaNeue"><br></font></span></div><div><div><font face="HelveticaNeue">On Friday 13 October 2023 at 9:30 AM at the UW Faculty of Physics (Pasteura 5, Warsaw; room 1.40) we are hosting a seminar during which</font></div><div style="margin: 0px; font-stretch: normal; line-height: normal; min-height: 14px;"><b><font face="HelveticaNeue"><br></font></b></div><div style="margin: 0px; font-stretch: normal; line-height: normal; min-height: 14px;"><font face="HelveticaNeue"><b>Tomasz Szawełło </b>(FUW)</font></div><div style="margin: 0px; font-stretch: normal; line-height: normal; min-height: 14px;"><font face="HelveticaNeue"><br></font></div><div style="margin: 0px; font-stretch: normal; line-height: normal;"><font face="HelveticaNeue">will give a talk</font></div><div style="margin: 0px; font-stretch: normal; line-height: normal; min-height: 14px;"><font face="HelveticaNeue"><br></font></div><div style="margin: 0px; font-stretch: normal; line-height: normal;"><div style="margin: 0px; font-stretch: normal; line-height: normal;"><div style="margin: 0px; font-stretch: normal; line-height: normal;"><h2 style="margin: 6px 0px 12px; padding: 0px; caret-color: rgb(68, 68, 68);"><span style="font-size: 12px;"><font face="HelveticaNeue">How dissolution is altered by precipitation: a network model of a porous medium</font></span></h2></div></div></div><div style="margin: 0px; font-stretch: normal; line-height: normal;"><b><font face="HelveticaNeue">Abstract</font></b></div><div style="margin: 0px; font-stretch: normal; line-height: normal;"><div style="margin: 0px; font-stretch: normal; line-height: normal;"><div style="margin: 0px; font-stretch: normal; line-height: normal;">We consider a porous medium infiltrated by a reactive fluid that triggers coupled dissolution/precipitation reactions at pore surfaces. To study these processes, we model the porous medium as a system of interconnected pipes (Budek, 2012) with the diameter of each segment increasing in proportion to the local reactant consumption. We investigate different evolution regimes, analysing the feedback between dissolution and precipitation and considering different models of reactive area evolution, including passivation processes on mineral surfaces. We benchmark the model against the experimental results of Poonoosamy et al. (2020).</div><div style="margin: 0px; font-stretch: normal; line-height: normal;"><br></div><div style="margin: 0px; font-stretch: normal; line-height: normal;">Budek, A., et al. (2012), Network models of dissolution of porous media. Phys. Rev. E, 86, 056318.</div><div style="margin: 0px; font-stretch: normal; line-height: normal;">Poonoosamy, J., et al. (2020), Effects of solution supersaturation on barite precipitation in porous media and consequences on permeability: Experiments and modelling. Geochim. Cosmochim. Acta., 270: 43-60.</div></div></div><div style="margin: 0px; font-stretch: normal; line-height: normal;"><div style="margin: 0cm; background-color: white;"><div style="margin: 0px; font-stretch: normal; line-height: normal;"><font face="HelveticaNeue"><br></font></div></div></div><div style="margin: 0px; font-stretch: normal; line-height: normal;"><font face="HelveticaNeue">We warmly welcome everyone to attend the talk and the Soft Matter Coffee Break after the seminar, held in room 2.63 (2nd floor).</font></div></div><div><font face="HelveticaNeue"><br></font></div><div><div dir="auto" style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><div><div style="margin: 0px; font-stretch: normal; line-height: normal;"><font face="HelveticaNeue">Maria Ekiel-Jeżewska</font></div><div style="margin: 0px; font-stretch: normal; line-height: normal;"><font face="HelveticaNeue">Maciej Lisicki</font></div><div style="margin: 0px; font-stretch: normal; line-height: normal;"><font face="HelveticaNeue">Piotr Szymczak</font></div><div style="margin: 0px; font-stretch: normal; line-height: normal;"><font face="HelveticaNeue">Panagiotis Theodorakis</font></div><div style="margin: 0px; font-stretch: normal; line-height: normal;"><font face="HelveticaNeue">Marek Trippenbach</font></div></div></div></div><div><div dir="auto" style="font-family: HelveticaNeue; overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><div dir="auto" style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><div dir="auto" style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><div dir="auto" style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><div dir="auto" style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><div dir="auto" style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><div dir="auto" style="overflow-wrap: break-word; -webkit-nbsp-mode: space; 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