Rotating stalls are generally the first instability met in turbomachinery. before surges. This 3D phenomenon is characterized by one or more stalled flow cells which rotate at a fraction of the impeller speed. The goal of the present work is to shed some light on the entropy generation in a centrifugal fan under rotating stall conditions. https://ulefdjzz7f0sov.blog-kids.com/35126117/should-we-look-for-a-hero-to-save-us-from-the-coronavirus-the-commons-as-an-alternative-trajectory-for-social-change