نتایج جستجو برای: ferrofluid

تعداد نتایج: 764  

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2004
Adrian Lange

The ferrofluid dynamics theory is applied to thermodiffusive problems in magnetic fluids in the presence of magnetic fields. The analytical form for the magnetic part of the chemical potential and the most general expression of the mass flux are given. By applying these results to experiments, global Soret coefficients in agreement with measurements are determined. An estimate for a hitherto un...

2004
Robert Krauß Mario Liu Bert Reimann Reinhard Richter Ingo Rehberg

A magnetic field rotating on the free surface of a ferrofluid layer is shown to induce considerable fluid motion towards the direction the field is rolling. The measured flow velocity i) increases with the square of the magnetic field amplitude, ii) is proportional to the thickness of the fluid layer, and iii) has a maximum at a driving frequency of about 3 kHz. The pumping speed can be estimat...

2016
Sandra de Pedro Xavier Muñoz-Berbel Rosalia Rodríguez-Rodríguez Jordi Sort Jose A. Plaza Juergen Brugger Andreu Llobera Victor J. Cadarso

1 Esfera UAB, Institut de Microelectrònica de Barcelona IMB-CNM (CSIC), Bellaterra, Spain, 2Department of Pharmacology, University of Sevilla, Sevilla, Spain, 3 Faculty of Medicine and Health Sciences, Basic Sciences Department, Universitat Internacional de Catalunya, Barcelona, Spain, 4 Departament de Física, Institució Catalana de Recerca i Estudis Avançats (ICREA), Universitat Autònoma de Ba...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2008
Carlos Alvarez Martial Mazars Jean-Jacques Weis

We present extensive Monte Carlo simulations for the thermodynamic and structural properties of a planar bilayer of dipolar hard spheres for a wide range of densities, dipole moments, and layer separations. Expressions for the stress and pressure tensors of the bilayer system are derived. For all thermodynamic states considered, the interlayer energy is shown to be attractive and much smaller t...

2016
Majid Hejazian

Abstract: Effective and rapid mixing is essential for various chemical and biological assays. The present work reports a simple and low-cost micromixer based on magnetofluidic actuation. The device takes advantage of magnetoconvective secondary flow, a bulk flow induced by an external magnetic field, for mixing. A paramagnetic stream of diluted ferrofluid and a non-magnetic stream are introduce...

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