scholarly journals Generalized coordinate gauge, nonabelian Stokes theorem and the dual QCD Lagrangian

1998 ◽  
Vol 437 (1-2) ◽  
pp. 146-152 ◽  
Author(s):  
V.I. Shevchenko ◽  
Yu.A. Simonov
Author(s):  
L. T. Wang

Abstract A new method of formulating the generalized equations of motion for simple-closed (single loop) spatial linkages is presented in this paper. This method is based on the generalized principle of D’Alembert and the use of the transformation Jacobian matrices. The number of the differential equations of motion is minimized by performing the method of generalized coordinate partitioning in the joint space. Based on this formulation, a computational algorithm for computer simulation the dynamic motions of the linkage is developed, this algorithm is not only numerically stable but also fully exploits the efficient recursive computational schemes developed earlier for open kinematic chains. Two numerical examples are presented to demonstrate the stability and efficiency of the algorithm.


Author(s):  
Marcelo J. S. deLemos ◽  
Paulo H. S. Carvalho

This paper presents computations for natural convection within a porous cavity filled with a fluid saturated permeable medium. The finite volume method in a generalized coordinate system is applied. The walls are maintained at constant but different temperatures, while the horizontal walls are kept insulated. Governing equations are written in terms of primitive variables and are recast into a general form. Flow and heat transfer characteristics are investigated for two energy models and distinct solid-to-fluid thermal conductivity ratio.


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