20.500.12556/DKUM-26486 Sledenje delcem v toku viskozne tekočine Particle tracking in viscous fluid flow Predstavljena je numerična študija obnašanja delcev v gnani kotanji. Viskozen laminaren tok je simuliran s programskim paketom, ki temelji na metodi robnih elementov. Razvit je algoritem za Lagrangeovo sledenje delcev. Fizikalni model vključuje težnost, vzgon, upor in prispevke zaradi tlačnega gradienta ter dodane mase. Algoritem je bil uporabljen za simulacijo toka in obnašanja delcev v gnani kotanji. Raziskani so bili pogoji za vstop delcev različnih premerov in gostot v sekundarne vrtince v kotanji. Izvedena je bila parametrična študija. Ugotovljeno je bilo, da je velikost delca odločujoč faktor za vstop v sekundarne vrtince. Izvedena je bila primerjava z eksperimentalnimi podatki, ki je pokazala odlično ujemanje rezultatov numeričnih simulacij in eksperimentov. A numerical study of particle motion in a cubic lid driven cavity is presented. As a computational tool, a boundary element based flow solver with a Lagrangian particle tracking algorithm is derived. Flow simulations were performed using an in-house boundary element based 3D viscous flow solver. The Lagrangian particle tracking algorithm is capable of simulating dilute suspensions of particles in viscous flows taking into account gravity, buoyancy, drag, pressure gradient and added mass. The derived algorithm is used to simulate particle behaviour in a lid driven cavity flow. The main goal of the paper was to numerically simulate the flow behaviour of spheres of different densities and different diameters. The study of slightly buoyant and non-buoyant particles in a lid driven cavity was aimed at discovering cases when particles leave the primary vortex and enter into secondary vortices. A parametrical study of this phenomenon was preformed. The presented computational results show excellent agreement with experiments, confirming the accuracy of the developed computational method. disperzni dvofazni tokovi viskozni laminarni tok Lagrangeovo sledenje delcev gnana kotanja velikost delcev true false false Slovenski jezik Angleški jezik Neznano 2012-05-31 13:48:18 2012-05-31 13:48:19 2022-04-15 03:41:48 2024-01-03 03:29:16 2009 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 532 13456406 URN:SI:UM:DK:MU9LWERZ http://www.drustvozamehaniko.si/zbornik/ZbornikKD2009.pdf 1 https://dk.um.si/Dokument.php?lang=slv&id=35515 Fakulteta za strojništvo 0 0 0