Research Article

Investigating the influential factors of ejective time and compressible force magnitude to fluid jet movement

Faculty of Mechanical Engineering, Ha Noi University of Industry, No 298, Cau Dien Street, Bac Tu Liem District, Hanoi City, Vietnam

^* e-mail: nguyenvanquang@haui.edu.vn; nguyenquang.kuas@gmail.com

Received: 19 January 2021
Accepted: 12 June 2021

Abstract

The molecular dynamics is the research method which is used to simulate the liquid ejection in this paper. The factors of 200000 time step (fs) total ejective time of total 200 000 time steps (fs) and various compressible forces of 9.0 × 10⁻¹⁰, 10.0 × 10⁻¹⁰ and 11.0 × 10⁻¹⁰ Newton (N) are main investigated in this research. These influences have action to the moveable direction of fluid jet in the whole ejective process. The research result indicates that liquid jet is prepared to separate out from nozzle plate's surface to form up droplets at the ejective time of 140 000 fs for the nozzle diameter size of 27.5 Angstrom (Å), system temperature of 310 Kelvin (K) and compressible force magnitude of 9.0 × 10⁻¹⁰ (N). However, when increasing the ejective time or compressible force magnitude, the jets were not only non-destruction from nozzle's surface to produce the droplets but also downward movement to go back the nozzle's surface. Meanwhile, with the nozzle diameter size of 40 Å, the droplets are not only production but also movement up to go away the nozzle under same research condition. Those prove that the ejective time and compressible force magnitude have the influences to the moveable direction of fluid jet in the whole ejective process.