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In fluid dynamics, the radiation stress is the depth-integrated – and thereafter phase-averaged – excess momentum flux caused by the presence of the surface gravity waves, which is exerted on the mean flow. The radiation stresses behave as a second-order tensor. The radiation stress tensor describes the additional forcing due to the presence of the waves, which changes the mean depth-integrated horizontal momentum in the fluid layer. As a result, varying radiation stresses induce changes in the mean surface elevation (wave setup) and the mean flow (wave-induced currents).

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  • In fluid dynamics, the radiation stress is the depth-integrated – and thereafter phase-averaged – excess momentum flux caused by the presence of the surface gravity waves, which is exerted on the mean flow. The radiation stresses behave as a second-order tensor. The radiation stress tensor describes the additional forcing due to the presence of the waves, which changes the mean depth-integrated horizontal momentum in the fluid layer. As a result, varying radiation stresses induce changes in the mean surface elevation (wave setup) and the mean flow (wave-induced currents). For the mean energy density in the oscillatory part of the fluid motion, the radiation stress tensor is important for its dynamics, in case of an inhomogeneous mean-flow field. The radiation stress tensor, as well as several of its implications on the physics of surface gravity waves and mean flows, were formulated in a series of papers by Longuet-Higgins and Stewart in 1960–1964. Radiation stress derives its name from the analogous effect of radiation pressure for electromagnetic radiation. (en)
  • In de vloeistofmechanica is de golfspanning (Engels: radiation stress) de diepte-geïntegreerde — en vervolgens fasegemiddelde — overmatige impulsstroom, veroorzaakt door de aanwezigheid van de oppervlaktegolven, die wordt uitgeoefend op de gemiddelde stroming. Deze verandering van deze spanning aan de kust levert een kracht op het water, die verantwoordelijk is voor de golfgedreven brandingsstroom en voor de golfopzet. De golfspanningen gedragen zich als een tweede-orde tensor. De golfspanningstensor, evenals een aantal van de implicaties ervan voor de fysica van de oppervlaktegolven en gemiddelde stromen, werden geformuleerd in een reeks van publicaties door Longuet-Higgins en Stewart in 1960-1964. Voor verdere informatie zie. Golfspanning ontleent zijn Engelse naam (radiation stress) aan het analoge effect van stralingsdruk op elektromagnetische straling. (nl)
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  • In fluid dynamics, the radiation stress is the depth-integrated – and thereafter phase-averaged – excess momentum flux caused by the presence of the surface gravity waves, which is exerted on the mean flow. The radiation stresses behave as a second-order tensor. The radiation stress tensor describes the additional forcing due to the presence of the waves, which changes the mean depth-integrated horizontal momentum in the fluid layer. As a result, varying radiation stresses induce changes in the mean surface elevation (wave setup) and the mean flow (wave-induced currents). (en)
  • In de vloeistofmechanica is de golfspanning (Engels: radiation stress) de diepte-geïntegreerde — en vervolgens fasegemiddelde — overmatige impulsstroom, veroorzaakt door de aanwezigheid van de oppervlaktegolven, die wordt uitgeoefend op de gemiddelde stroming. Deze verandering van deze spanning aan de kust levert een kracht op het water, die verantwoordelijk is voor de golfgedreven brandingsstroom en voor de golfopzet. De golfspanningen gedragen zich als een tweede-orde tensor. (nl)
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  • Golfspanning (nl)
  • Radiation stress (en)
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