"What a DRAG..."

It is important to keep in mind that unless one or more of the flowfield’s processes responsible for creating pressure drag are impacted, modifications to the surface pressure distribution will not alter the pressure drag. Therefore, it may be quite deceptive to consider only the surface pressures itself in order to comprehend how a change in the surface pressures can impact the pressure drag. It is important to think about how the modification could impact the strength of any shocks, the lift distribution, or the viscous dissipation in the field. Asking questions like “where in the field is the drag being ‘produced,’ and how is this change likely to affect that process?” is an excellent habit to get into. If asking the question leads to doubt, at least that response is better than being duped by simplistic logic.

PART I - Our primary objective in was to provide fundamental ideas about the body's contributions to drag force.

Part II - we dove right into and some slightly more specific and practical issues related to drag effects of surface roughness on turbulent drag friction along with The Turbulence-Modeling Approach where a we description of a method for forecasting the increase in skin friction (Cf) in computational fluid dynamics (CFD) simulations due to surface roughness.

Part III - perhaps the most Intriguing new "What a DRAG..." blog post, where the role of CFD in analyzing drug reduction and other types of drag reduction will be investigated.

And there is much more to anticipated in the "What a DRAG..." series of posts

#cfd #drag #aerodynamics