ABSTRACT
Forces acting on a sand grain in an aeolian environment. The lift force (FL) results from an increase in velocity and a decrease in pressure due to airflow compressing above the grain. The drag force (FD) is the resistance to the flow coming from the sand bed. The resulting force is the fluid force (FF) that pivots the grain around its neighbour. (Drawn according to <xref ref-type="bibr" rid="ref12_r7">Siever 1988</xref>.) MArch Dissertation of Karola Dierichs, February 2009. https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315881294/8c633402-ec95-4ecb-990e-cc99cb482b6f/content/fig12_1_B.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/>
