20.500.12556/RUL-151690 A numerical study of gas focused non-Newtonian micro-jets The present numerical study assesses the jet length, diameter and velocity of various non-Newtonian power-law fluids of a gas dynamic virtual nozzle. A related two-phase flow problem is formulated within the mixture framework and solved with the finite volume method and volume of fluid interface treatment in axisymmetry. The process parametric range allows the incompressible laminar flow assumption. A comprehensive jet characteristics analysis is carried out in a typical micro-nozzle configuration for a range of shear-thinning to shear-thickening fluids with power law indices 0.5 ≤ n < 1.5, gas mass flow rate of 10 mg/min and liquid volumetric flow rate of 43 µl/min, resulting in a gas Reynolds number of 130 with Reynolds and Weber numbers for a reference water jet being 90 and 10, respectively. It is observed that jets from shear-thinning fluids (0.5 ≤ n < 1.0) tend to be thicker, longer, and slower when compared with the shear-thickening fluids (1.0 < n ≤ 1.5). A dripping-jetting phase diagram of the nozzle is constructed by varying the power law index, gas and liquid flow rates in the range 0.9–1.1, 5–15 mg/min and 5–50 µl/min, respectively. It is observed that the area of stable jetting decreases with the increase of the power law index. The obtained novel information on the behaviour of non-Newtonian gas-focused micro-jets provides a possible new dimension for tailoring the serial crystallography sample delivery systems where the micro-jets carry dispersed crystals into an X-ray beam. serial crystallography micro jets multiphase flow fluid rheology non-Newtonian fluid flow focusing gas dynamic virtual nozzle liquid jets power law shear thinning shear thickening serijska kristalografija mikrocurki večfazni tok reologija toka nenewtonska tekočina fokusiranja toka true false true Angleški jezik Slovenski jezik Članek v reviji 2023-10-16 14:20:19 2023-10-16 14:20:20 2024-10-03 10:51:52 0000-00-00 00:00:00 2024 0 0 16 str. Vol. 170, art. 104628 Jan. 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 532:519.6 0301-9322 10.1016/j.ijmultiphaseflow.2023.104628 168605443 Zahoor,_Bajt,_Sarler_A_numerical_study_of_gas_focused_non-Newtonian_micro-jets.pdf Zahoor,_Bajt,_Sarler_A_numerical_study_of_gas_focused_non-Newtonian_micro-jets.pdf 1 9E01C988509B22B2E6F1BDA5B09C9CF0 4507a09198f3218d669fdfee43eb010eec32e4e2c15b5d7faed4dbcc261dba57 cdc8ddad-6c1f-11ee-a772-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=176720 https://www.sciencedirect.com/science/article/pii/S0301932223002483 1 6046e287-6c1e-11ee-a772-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=176719 Fakulteta za strojništvo 0 0 0