Analysis of aerodynamic torques affecting dust particle orientation as input to microwave cross polarization

Abdulwaheed , Musa and Saad Osman, Bashir and Sameir, Ali (2013) Analysis of aerodynamic torques affecting dust particle orientation as input to microwave cross polarization. In: 2013 1st IEEE International Conference on Computing, Electrical and Electronics Engineering, ICCEEE 2013, 26-28 August 2013, Khartoum; Sudan.

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Abstract

Cross polarization in microwave link, method of using dual orthogonal polarizations to optimally conserve the frequency spectrum, has received considerable interest in the recent time. This paper implicitly discusses its prediction in sand and dust storms. Cross polarization in dust storms occurs due to the non-sphericity of the falling dust particles and the tendency of the particles to align in a particular direction at a time (canting angle). It is therefore important to have adequate information on the dust particle sizes, particle shapes, orientation of particles along the propagation path etc. for the cross polarization due to dust storms. This work deals with the latter two points by making use of a more reliable measure of turbulence shear and inertial torque to tackle orientation of sand and dust storms suspended particles calculations as input to cross polarization discrimination magnitudes. The paper explicitly analyses the systematic alignment of particles due to torque of fluid flow round dust particles as a main parameter causing cross polarization. The results obtained show that there exists some form of systematic alignment of particles in the most relevant size range that was considered.

Item Type:	Conference or Workshop Item (Full Paper)
Additional Information:	6501/40379
Uncontrolled Keywords:	cross polarization; fluid flow; inertial torque; particle alignment; sand-dust storms; turbulent flow
Subjects:	T Technology > T Technology (General)
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Electrical and Computer Engineering
Depositing User:	Saad O Bashir
Date Deposited:	06 Jan 2015 14:52
Last Modified:	06 Jan 2015 14:52
URI:	http://irep.iium.edu.my/id/eprint/40379

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