In a body submerged in a fluid, unsteady forces due to acceleration of that body with respect to the fluid, can be divided into two parts: the virtual mass effect and the Basset force. The Basset force term describes the force due to the lagging boundary layer development with changing relative velocity (acceleration) of bodies moving through a fluid.The Basset term accounts for viscous effects and addresses the temporal delay in boundary layer development as the relative velocity changes with time. It is also known as the "history" term.The Basset force is difficult to implement and is commonly neglected for practical reasons; however, it can be substantially large when the body is accelerated at a high rate.
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| - Basset force (en)
- Force de Basset (fr)
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| - La force de Basset est la force apparente exercée sur un objet dont la trajectoire est accélérée dans un écoulement. Le terme apparent est lié au fait que l'on remplace le résultat de l'écoulement instationnaire autour de l'objet par une propriété relative à un écoulement stationnaire. Pour cette raison on parle d'effet d'histoire : l'écoulement autour de l'objet dépend de l'histoire de la particule. Pour un écoulement de Stokes cet effet a été modélisé par Joseph Boussinesq (1885) et Alfred Barnard Basset (1888). Il est pour cela parfois dénommé force de Basset-Boussinesq. (fr)
- In a body submerged in a fluid, unsteady forces due to acceleration of that body with respect to the fluid, can be divided into two parts: the virtual mass effect and the Basset force. The Basset force term describes the force due to the lagging boundary layer development with changing relative velocity (acceleration) of bodies moving through a fluid.The Basset term accounts for viscous effects and addresses the temporal delay in boundary layer development as the relative velocity changes with time. It is also known as the "history" term.The Basset force is difficult to implement and is commonly neglected for practical reasons; however, it can be substantially large when the body is accelerated at a high rate. (en)
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| - In a body submerged in a fluid, unsteady forces due to acceleration of that body with respect to the fluid, can be divided into two parts: the virtual mass effect and the Basset force. The Basset force term describes the force due to the lagging boundary layer development with changing relative velocity (acceleration) of bodies moving through a fluid.The Basset term accounts for viscous effects and addresses the temporal delay in boundary layer development as the relative velocity changes with time. It is also known as the "history" term.The Basset force is difficult to implement and is commonly neglected for practical reasons; however, it can be substantially large when the body is accelerated at a high rate. This force in an accelerating Stokes flow has been proposed by Joseph Valentin Boussinesq in 1885 and Alfred Barnard Basset in 1888. Consequently, it is also referred to as the Boussinesq–Basset force. (en)
- La force de Basset est la force apparente exercée sur un objet dont la trajectoire est accélérée dans un écoulement. Le terme apparent est lié au fait que l'on remplace le résultat de l'écoulement instationnaire autour de l'objet par une propriété relative à un écoulement stationnaire. Pour cette raison on parle d'effet d'histoire : l'écoulement autour de l'objet dépend de l'histoire de la particule. Pour un écoulement de Stokes cet effet a été modélisé par Joseph Boussinesq (1885) et Alfred Barnard Basset (1888). Il est pour cela parfois dénommé force de Basset-Boussinesq. (fr)
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