Electrodynamic properties of a thin-film periodic structure in an external magnetic field

2011 ◽  
Vol 56 (4) ◽  
pp. 510-514 ◽  
Author(s):  
A. A. Bulgakov ◽  
I. V. Fedorin
Keyword(s):  
Magnetic Field ◽  
Thin Film ◽  
External Magnetic Field ◽  
Periodic Structure

scholarly journals Horocycles of Light in a Ferrocell

2021 ◽  
Vol 6 (3) ◽  
pp. 30
Author(s):  
Alberto Tufaile ◽  
Michael Snyder ◽  
Adriana Pedrosa Biscaia Tufaile
Keyword(s):  
Magnetic Field ◽  
Thin Film ◽  
External Magnetic Field ◽  
Light Source ◽  
Geometrical Theory ◽  
Thin Structures ◽  
Point Light Source ◽  
Geometrical Theory Of Diffraction ◽  
Point Light ◽  
The Magnetic Field

We studied the effects of image formation in a device known as Ferrocell, which consists of a thin film of a ferrofluid solution between two glass plates subjected to an external magnetic field in the presence of a light source. Following suggestions found in the literature, we compared the Ferrocell light scattering for some magnetic field configurations with the conical scattering of light by thin structures found in foams known as Plateau borders, and we discuss this type of scattering with the concept of diffracted rays from the Geometrical Theory of Diffraction. For certain magnetic field configurations, a Ferrocell with a point light source creates images of circles, parabolas, and hyperboles. We interpret the Ferrocell images as analogous to a Möbius transformation by inversion of the magnetic field. The formation of circles through this transformation is known as horocycles, which can be observed directly in the Ferrocell plane.

scholarly journals Numerical analysis of flow and heat transfer in a thin film along an unsteady stretching cylinder

2021 ◽  
Vol 25 (Spec. issue 2) ◽  
pp. 441-448
Author(s):  
Azeem Shahzad ◽  
Bushra Habib ◽  
Muhammad Nadeem ◽  
Muhammad Kamran ◽  
Hijaz Ahma ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Thin Film ◽  
Heat Transfer ◽  
Boundary Layer ◽  
External Magnetic Field ◽  
Stretching Cylinder ◽  
Similarity Transformations ◽  
Flow And Heat Transfer ◽  
Governing System ◽  
The Impact

In this framework, the boundary-layer mass and heat flow in a liquid film over an unsteady stretching cylinder are discussed under the influence of a magnetic field. By means of the similarity transformations the highly non-linear governing system of PDE is converted to ODE. We use the built-in function bvp4c in MATLAB to solve this system of ODE. The impact of distinctive parameters on velocity and temperature profile in the existence of an external magnetic field is depicted via graphs and deep analysis is also presented.

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