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| 001 | 627917 | ||
| 005 | 20250813214525.0 | ||
| 024 | 7 | _ | |a 10.1063/5.0281409 |2 doi |
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| 100 | 1 | _ | |a Zupan, Bor |0 P:(DE-H253)PIP1097895 |b 0 |
| 245 | _ | _ | |a Numerical treatment of electrical properties in two-phase electrohydrodynamic systems |
| 260 | _ | _ | |a [Erscheinungsort nicht ermittelbar] |c 2025 |b American Institute of Physics |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 520 | _ | _ | |a Generation and manipulation of micrometer-sized liquid jets is highly relevant for applications like sample delivery in serial femtosecondcrystallography. A promising method combines gas flow focusing with electrospraying but remains underexplored due to numerical limita-tions regarding high interfacial electric property gradients. This study addresses this challenge by assessing different approaches for electrohy-drodynamic (EHD) numerical treatment of two-phase interfaces within the finite volume method and the volume-of-fluid framework. A newgeometric mean interpolation technique was developed to address the limitations of high electric conductivity-ratio gas–liquid systems. Thetechnique was related to the established EHD modeling approaches, comprising two electric force implementations and two electric propertyinterpolation methods. Three verification tests involving no flow conditions demonstrated consistent performance of all solvers regarding theelectric equations, and they were charge-conservative. Validation on a free boundary problem experiment revealed varying levels of agree-ment. Results show that the Coulomb-polarization force implementation combined with weighted harmonic mean interpolation provides themost accurate and physically consistent modeling of electric forces at fluid interfaces, followed by the novel geometric mean technique. Themodel based on the Coulomb-polarization force is applied to simulate electro-flow-focused jets, capturing the complex interplay of hydrody-namic and electrostatic forces in a high-velocity co-flow configuration. While weighted harmonic mean interpolation yields the highest fidel-ity regarding the electric force magnitude and electric charge position, it fails for extremely low gas conductivities. The proposed geometricmean interpolation provides a stable alternative for simulating EHD two-phase flows, particularly in configurations with large interfacial elec-tric property gradients. |
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| 700 | 1 | _ | |a Zahoor, Rizwan |0 P:(DE-H253)PIP1025658 |b 1 |
| 700 | 1 | _ | |a Bajt, Sasa |0 P:(DE-H253)PIP1006443 |b 2 |
| 700 | 1 | _ | |a Sarler, Bozidar |0 P:(DE-H253)PIP1087069 |b 3 |e Corresponding author |
| 773 | _ | _ | |a 10.1063/5.0281409 |g Vol. 37, no. 8, p. 083353 |0 PERI:(DE-600)1472743-2 |n 8 |p 083353 |t Physics of fluids |v 37 |y 2025 |x 1527-2435 |
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