Analysis of Thrust Due to the Coanda Phenomenon

Abstract

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Flow physics of planar bistable fluidic oscillator with backflow limbs

“…In typical feedback, wall attachment FO, the interaction between flow through backflow limbs and the inherent wall attachment of jet due to the Coandă effect 5,6 establishes a complex oscillating flow involving multiple vortices. To capture and study these dynamic flow patterns, it is therefore essential to model the unsteady flow processes.…”

“…The wall attachment FOs work on the fluid dynamic principle known as the Coand a effect. 5 The tendency of a fluid jet to attach itself to the adjacent wall is known as the Coand a effect. This term was first coined by the Romanian inventor Henri Coand a, 6 and this fluid-wall interaction is named after him.…”

“…The wall attachment FOs work on the fluid dynamic principle known as the Coandă effect 5 . The tendency of a fluid jet to attach itself to the adjacent wall is known as the Coandă effect.…”

Radial Diffusers – Simulation of Three‐Dimensional Flow Effects with CFD (Part 2)

“…Dieses Ablenken und ggf. Anlegen an eine ebene oder auch gekrümmte Oberfläche wird als Coandă‐Effekt bezeichnet . Beschreibt die Strömung eine Kurvenbahn, liegt infolge der Fliehkraftwirkung eine Druckänderung quer zur Strömungsrichtung vor.…”

“…Das asymmetrische Ausströmen im nicht‐isothermen Fall kann daher nicht allein auf das Geschwindigkeitsprofil zurückzuführen sein. Laut Coandă lässt sich eine Strömung auch nur dann ablenken, wenn sich das System aus Strahl und Umgebung nicht im Gleichgewicht befindet. Da sich in Teil 1 die Ausströmcharakteristik praktisch nicht veränderte, kann demzufolge dort von einem stabilen System ausgegangen werden.…”