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单词 Ideal flow
释义

Ideal flow

中文百科

位流 Potential flow

(重定向自Ideal flow)
在NACA 0012翼型周围的位流流线,攻角11°。
在均匀湍流中,圆柱周围的不可压缩位流流线。
A potential flow is constructed by adding simple elementary flows and observing the result.

在流体动力学中,位流(Potential Flow)是指一道速度场是一纯量函数(即速度位)的梯度的流。因此,位流的特点是无旋性速度场,这是对于几种应用的有效近似。位流的无旋性是因为梯度的旋度始终为零的关系。

在不可压缩流的类型中,位流满足拉普拉斯方程与位理论。然而,位流也可用来描述可压缩流。位流近似发生于稳流与非稳流的模型上。

位流应用于:翼型、海浪、电渗流与地下水流的外部流场。对于有强大涡效应的流,位流近似并不适用。

英语百科

Potential flow 位流

(重定向自Ideal flow)
Potential-flow streamlines around a NACA 0012 airfoil at 11° angle of attack, with upper and lower streamtubes identified.
A potential flow is constructed by adding simple elementary flows and observing the result.
Streamlines for the incompressible potential flow around a circular cylinder in a uniform onflow.

In fluid dynamics, potential flow describes the velocity field as the gradient of a scalar function: the velocity potential. As a result, a potential flow is characterized by an irrotational velocity field, which is a valid approximation for several applications. The irrotationality of a potential flow is due to the curl of the gradient of a scalar always being equal to zero.

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更新时间:2025/6/17 18:57:23