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Flows of bubbly liquids

100%

Tao L. , Rajagopal K. R.

1999

tom Vol. 4, no 3

407-442

This paper deals with the modeling of flows of a Newtonian liquid dispersed with bubbles. We provide an averaging procedure that combines and gainfully exploits area, volume and ensemble averaging methods, and arrives at the governing equations for bubbly liquids. Expressions are suggested for the interaction mechanisms and other constitutive quantities that appear as a consequence of the averaging. Restrictions on the constitutive quantities due to the second law of thermodynamics are delineated and a specific boundary value problem solved within the context of the theory. It is found that the prediction of the theory compares favorably with experimental observations for the specific boundary value problem under consideration.

Experimental studies and modeling of four-wheeled mobile robot motion taking into account wheel slippage

100%

Jaskot A. , Posiadała B. , Jaskot A. , Posiadała B.

Stock mechanics: Predicting recession in S&P500, DJIA and NASDAQ

86%

Tuncay Ç.

Open Physics

2006

tom 4

nr 1

58-72

Proposed in this paper is an original method assuming potential and kinetic energies for prices and for the conservation of their sum that has been developed for forecasting exchanges. Connections with a power law are shown. Semiempirical applications on the S&P500, DJIA, and NASDAQ predict a forthcoming recession in them. An emerging market, the Istanbul Stock Exchange index ISE-100 is found harboring a potential to continue to rise.

Explicit form of the “modified point mass trajectory model” for the use in Fire Control Systems

86%

Baranowski L. , Majewski P. , Szymonik J. , Baranowski L. , Majewski P. , Szymonik J.

nr 5

Recursive Formulation For The Dynamic Simulation of Multibody Systems

58%

Attia H. A.

2007

tom Vol. 11, nr 1

5-19

In this paper, recursive dynamic formulation for the dynamic simulation of multibody systems are presented. The method uses the concepts of linear and angular momentums to generate the rigid body equations of motion in terms of the Cartesian coordinates of a dynamically equivalent constrained system of particles, without introducing any rotational coordinates and the corresponding rotational transformation matrix. For the open-chain system, the equations of motion are generated recursively along the serial chains. Closed-chain system is transformed to open-chain by cutting suitable kinematic joints and introducing cut-joint constraints. An example is chosen to demonstrate the generality and simplicity of the developed formulation.