We consider the dynamics of scroll waves in the presence of rotating anisotropy, a model of the left ventricle of the heart in which the orientation of fibers in successive layers of tissue rotates. By choosing a coordinate system aligned with the fiber rotation and studying the phase dynamics of a straight but twisted scroll wave, we derive a Burgers' equation with forcing associated with the ...

AIM Our study was conducted to evaluate whether higher temperature leads to increased - or wider - scroll widths of the Descemet's membrane endothelial keratoplasty (DMEK) donor graft. PURPOSE To investigate the effects of temperature and fluid media on the DMEK donor graft scroll widths. MATERIALS AND METHODS This research work was a laboratory investigation. Baseline cell count was taken ...

In this paper a new family of scroll grid attractors is presented. These families are classified into three called 1D-, 2Dand 3D-grid scroll attractors depending on the location of the equilibrium points in state space. The scrolls generated from 1D-, 2Dand 3D-grid scroll attractors are located around the equilibrium points on a line, on a plane or in 3D, respectively. Due to the generalization...

This paper focuses on the geometric theory of scroll compressor, which includes the determination of the discharge angle, the calculation of the volume in different compression stages, the axial gas force under the condition that the number of scroll turns equals an arbitrary real number. NOMENCLATURE . (J :expanding angle of the involute (rad) a :initial angle of the involute (rad) 6 : orbitin...

This study investigated the static and dynamic phenomena on R410A scroll compressor components by using finite element analysis (FEA) with ITRI self-developed scroll type compressor software (ITRI_STC software). The simulation results of the coefficient of performance, cooling capacity by tuning the design parameters integrated scroll geometric parameters with compressed discharge procedure and...

On the basis of the elastic mechanics theories, heat transfer theories, and CAE, the non-uniform temperature distribution was studied, Mises stress and deformation distribution of 3D twin-spirals scroll plates was presented. The Mises stress and deformation of scroll plates induced by non-uniform temperature field and gas pressure was investigated. Orbiting and fixed scrolls were engaged with e...

By simulations of the Barkley model, action of uniform periodic nonresonant forcing on scroll rings and wave turbulence in three-dimensional excitable media is investigated. Sufficiently strong rapid forcing converts expanding scroll rings into the collapsing ones and suppresses the Winfree turbulence caused by the negative tension of wave filaments. Slow strong forcing has an opposite effect, ...

A unidirectional coupling scheme is investigated in double scroll type chaotic oscillators that reveal interesting multiscroll dynamics. Instead of using self-oscillatory systems, in this scheme, double scroll chaos from one oscillator is forced into another similar oscillator in a resting state. This coupling scheme is explored in the Chua oscillator, a modified Chua oscillator and the Lorenz ...

John P. Elson Mgr. New Products The application of scroll compressor technology to the residential air conditioniong and heat pump markets has generated a variety of compressor design approaches to address special system requirements. This paper >till revie>t both special design needs of this application and unique scroll design concepts used to address these needs. Design concept discussions >...

This paper discusses the design of active controllers for generalized projective synchronization (GPS) of identical Li 2-scroll chaotic systems (Li, 2009), identical Lü-Chen 2-scroll chaotic systems (Lü and Chen, 2002) and non-identical Li and Lü-Chen 2-scroll systems. The synchronization results (GPS) derived in this paper for the 2-scroll chaotic systems have been derived using active control...