Shock waves in molecular clouds should evolve into continuous or C-type structures due to the magnetic field and ion-neutral friction. We here determine whether and how this is achieved through plane-parallel numerical simulations using an extended version of ZEUS. We first describe and test the adapted code against analytical results, laying the necessary foundations for subsequent works on su...

This work proposes a systematic methodology for designing an active leveling system (ALS) actuator lunar landing application. The ALS is integrated into inverted tripod leg layout, exploiting honeycomb crushable damper as shock absorber. proposed fitted within the leg’s primary strut and features custom permanent-magnet synchronous machine rigidly coupled with lead screw. aims to both provide p...

In order to get the more accurate damping capacity and durability of MR damper in real vehicle conditions. On basis fully understanding working state regulation principle damper, taking control current as variable, characteristic curves under different currents are obtained. Based on Miner's law theoretical support pseudo damage, through comparison test three logic combination conditions, a sui...

As novel absorber materials are developed and screened for their photovoltaic (PV) properties, the challenge remains to reproducibly test promising candidates for high-performing PV devices. Many early-stage devices are prone to device shunting due to pinholes in the absorber layer, producing "false-negative" results. Here, we demonstrate a device engineering solution toward a robust device arc...

A novel design of metamaterial (MTM) based absorber with reduced cell size is proposed in this paper. The absorber is designed to operate in the mid infrared (IR) regime using gold nano-pillar inclusions embedded in a dielectric spacer. The absorption band can be controlled by adjusting the nano-pillar’s properties. Numerical simulations have been conducted to investigate the effect of these in...

The oleo-pneumatic shock absorber involves a complex two-phase flow in the working process. In this paper, simple model was established, and volume-of-fluid (VOF) adopted to accurately simulate distribution of field through commercial software FLUENT 2020 R2. accuracy simulation verified by method engineering damping force estimation, error numerical results compared with estimation 7–8%. By si...