The Euler equations with frictional force have been extensively studied. Since the Boltzmann equation is closely related to the equations of gas dynamics, we study, in this paper, the Boltzmann equation with frictional force when the external force is proportional to the macroscopic velocity. It is...
aIn this equation for force balance on the control volume the acceleration term is equal to the static pressure and frictional forces acting on the control volume. 在这个等式为力量平衡在控制体积加速度期限与行动在控制体积的静压和摩擦力是相等的。[translate]...
This normal force is essential for calculating the frictional force. For a rope wrapped around a cylindrical capstan, the normal force can be found by considering the tension in the rope and the curvature of the capstan. The differential normal force dN over a small segment of the rope is ...
aThe relationship shown in the first equation signifies that the effective power conversion in the case of viscous flow consists of a part from the pressure distribution on the bucket surface and a part from the direct frictional force. 在first等式signifi显示的关系ES有效功率转换在黏fl...
From the general many-body Schrödinger equation for colliding heavy ions a classical equation of motion including frictional forces is deduced. It is argued that one of the main origins of friction between two colliding heavy ions is the reflection of nucleons off the moving edges of the singl...
The magnitude of the frictional force is often directly proportional to the normal force, or the force pressing the two surfaces against each other. The constant of proportionality varies depending on the surfaces which are in contact. For example, you might expect smaller friction when two "slick...
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The frictional force for Dynamic Friction can be expressed as: For an object pulled or pushed horizontally, the normal force - N - is simply the weight : N = m g Where: m = Mass (kg, slugs ) g = Gravity (9.81 m/s2 , 32 ft/s2) Material Against Material Static Coefficient of ...
In summary, the conversation discusses deriving a partial differential equation for a tightly stretched vibrating string with variable density, taking into consideration gravity and frictional force. The suggested approach involves finding the general wave equation and considering the motion of a point ...
Friction and friction coefficient for aluminium alloy extrusion; 铝合金挤压时的摩擦与摩擦因数 更多例句>> 4) Frictional Coefficient 摩擦因数 1. The experimental results indicate that the frictional coefficient of PCrMo steel is decreased as the slide-speed is increased,and it is increased as the...