A problem about tubing string vibration caused by the fluid unsteady flow inside tubing string is studied from the Angleofsolid liquid coupling vibration in dynamics.
文章从动力学中固液耦合振动的角度出发,研究了油管柱内流体不稳定流动引起的油管柱振动问题。
2
The higher the surface energy of the solid substrate in relation to the surface tension of the liquid, the better its wettability, and the smaller the contact Angle.
较高的表面能量的固体基质有关的表面张力的液体,它的更好的润湿性,较小的接触角。
3
The contact Angle is the Angle between the tangent line at the contact point and the horizontal line of the solid surface.