But for the continuous jet which velocity gradient is not linear, it has not only one virtual origin.
但对于非线性速度分布的连续射流，存在的虚拟原点不是唯一的。
The effects of the velocity gradient and wall-proximity on the measuring errors are related to the flow direction.
近壁对总压测量影响不大。速度梯度和近壁对测量误差的影响还与来流方向有关。
Velocity gradient, pressure gradient and circulation gradient are used to model the separated vortex flow field over a leading edge delta wing.
用速度梯度、压力梯度和环量梯度模拟大攻角尖前缘三角翼流场。
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