English: An example of convection. Though the flow may be steady (time independent), the fluid decelerates as it moves down the diverging duct (assuming incompressible or subsonic compressible flow), hence there is an acceleration happening over position.
Español: Un ejemplo de convección. Aunque el flujo es estacionario (independiente del tiempo), el fluido desacelera a medida que se mueve a lo lardgo del ducto (asumiento un flujo Flujo incompresible o un flubo compresible subsónico).
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