Gas flows through micro shock tubes are widely used in many engineering applications such as micro engines, particle delivery devices etc. Recently, few studies have been carried out to explore the shock wave excursions through micro shock tubes at very low Reynolds number and at rarefied gas condition. But these studies assumed centered shock and expansion waves, which are generally produced b...

In the process of double-layer gas-assisted extrusion plastic micro-tubes, external size and surface quality micro-tubes are greatly affected by assisting gas inlet slit inside mold. Therefore, in this experiment, a two-phase flow model was established based on compressible non-compressible melt. The Polyflow finite element solution software module used to solve velocity field, temperature pres...