أعرض تسجيلة المادة بشكل مبسط

dc.creator Browaeys J.
dc.creator Perzynski R.
dc.creator Bacri J.-C.
dc.creator Shliomis M. I.
dc.date 2001
dc.date.accessioned 2013-05-30T01:07:48Z
dc.date.available 2013-05-30T01:07:48Z
dc.date.issued 2013-05-30
dc.identifier http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332001000300016
dc.identifier http://www.doaj.org/doaj?func=openurl&genre=article&issn=01039733&date=2001&volume=31&issue=3&spage=441
dc.identifier.uri http://koha.mediu.edu.my:8181/jspui/handle/123456789/3254
dc.description We present here the experimental determination of the dispersion relation of surface waves of a ferrofluid submitted to a steady vertical magnetic field. The results are compared to a linear theory where all the magnetic characteristics of the fluid have been taken into account. The knowledge of the dispersion equation is then used to analyse the capillary-wave resistance, that is the drag force associated to the emission of waves by a moving disturbance at a free fluid surface. It undergoes a transition from zero to a finite value as the speed of the disturbance reaches a certain critical value. The effect of viscosity is explored, and a magnetic fluid is shown to allow controlling the critical speeds. Contrary to the theoretical model, however, the measured wave resistance reveals a non monotonic speed dependence after the threshold.
dc.publisher Sociedade Brasileira de Física
dc.source Brazilian Journal of Physics
dc.title Surface waves and wave resistance in magnetic fluids


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أعرض تسجيلة المادة بشكل مبسط