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Undo revision 874915 by FrederichE (talk)
'''Buoyancy-Driven Convection''' is [[convection]] current created due to the the difference in density between two or more fluids whilst their mass is acted upon by a [[gravity|gravitational field]], and can also refer to the [[heat]] transfer that occurs under these conditions. It is commonly known as '''natural convection''' because fluid motion is not induced by external [[force]]s, such as a fan, pump or the wind. When modeling this type of flow in [[fluid dynamics]], a ''Boussinesq approximation'' is often used, neglecting density differences between fluid particles except when they are multiplied by terms including gravitational acceleration.
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[[category:physics]]