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This paper deals with the flow of an electrostatic filter ash and water mixture. Experimantal data obtained from a pipe viscometer in Premogovnik Velenje Ltd. were used as the basis to determine the Power Law model by the least-squares method. With this model a numerical analysis with the finite volume method was performed and the results were compared with experimental data. Despite the 90% agreement between the numerical and experimental results there is still a need to use some other rheological models instead of the Power Law model, for example the Sisko model, the theoretical basis of which is also an integral part of this contribution. Prispevek obravnava tok zmesi elektrofiltrskega pepela in vode. Eksperimentalni podatki, pridobljeni v cevnem viskozimetru Premogovnika Velenje d.d., so bili uporabljeni kot osnova za določitev modela potenčnega zakona po metodi najmanjših kvadratov. S tako dobljenim modelom je bila izvedena numerična analiza toka z metodo končnih prostornin, rezultati pa primerjani z eksperimentalnimi. Kljub povprečno 90-odstotnemu ujemanju numeričnih in eksperimentalnih rezultatov bo v prihodnje treba namesto potenčnega zakona uporabiti kak drug, npr. Siskov model, katerega teoretične osnove so prav tako del prispevka. |
