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A level-set method for simulation of a thermal inkjet process

机译:模拟热喷墨过程的水平设定方法

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摘要

A numerical approach is presented for computing a thermal inkjet process, in which bubble growth and collapse acts as a driving mechanism for ink droplet ejection. The liquid-vapor and liquid-air interfaces are tracked by a level-set method which is modified to include the effect of phase change at the liquid-vapor interface and is extended to treat the contact angle condition at an immersed solid surface. The compressibility effect of a bubble is also included in the analysis to account for the high vapor pressure caused by instantaneous bubble nucleation. The whole process of the thermal inkjet, including jet breaking, satellite droplet formation, and ink refill, as well as bubble growth and collapse, is simulated without employing a simplified bubble growth model.
机译:提出了一种用于计算热喷墨过程的数值方法,其中气泡的增长和破裂是墨滴喷射的驱动机制。液体-蒸汽和液体-空气界面通过水平设定方法进行跟踪,该方法被修改为包括液体-蒸气界面处的相变影响,并扩展为在浸没的固体表面上处理接触角条件。分析中还包括了气泡的可压缩性,以说明瞬时气泡成核导致的高蒸气压。在不采用简化的气泡增长模型的情况下,可以模拟热喷墨的整个过程,包括射流破裂,卫星液滴形成和墨水重新填充以及气泡的生长和破裂。

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