Pressure gradient force

Atmosphere

Published in Wayne T. Davis, Joshua S. Fu, Thad Godish, Air Quality, 2021

Wayne T. Davis, Joshua S. Fu, Thad Godish

Pressure differences in the lower atmosphere occur along a gradient in the horizontal dimension. The force associated with these differences is called the pressure gradient force. The nature of PGFs can be seen from weather maps on which lines of equal pressure (isobars) are plotted (Figure 1.9). The spacing of isobars describes pressure gradients. Isobars relatively close together indicate a strong or steep pressure gradient with high associated winds. If these isobars were contour intervals, they would describe steep or mountainous terrain. Isobars relatively far apart are characterized by small pressure gradients and light winds. The PGF is directed perpendicular to isobars from high to low pressure.

The effects of the height-to-width ratio of the rectangular inlet on the flow field and separation performance by hydrocyclone

View Article

Journal Information

Published in International Journal of Coal Preparation and Utilization, 2022

Feng Li, Peikun Liu, Xinghua Yang, Yuekan Zhang, Lanyue Jiang, Hui Wang

The pressure gradient force () refers to the force applied on unit mass of fluid because of non-uniform pressure distribution. Fine particles are mainly subjected to the pressure gradient (Chu et al. 2009) while the pressure gradient force is in direct proportion to the pressure drop:

Pressure gradient force

Explore chapters and articles related to this topic

Atmosphere

The effects of the height-to-width ratio of the rectangular inlet on the flow field and separation performance by hydrocyclone