Program for flow elements

Polyflow, a finite element program for calculating viscous and viscoelastic flows, Polyflow SA, Place de l Universite 16, B-1348 Louvain-la-Neuve, Belgium (1988)... 

The time critical part of this analysis is the segment averaging in the frequency domain. Figure 2 shows a flow diagram of the computer program for the determination of cross-correlations. Data have been sampled simultaneously from two anemometer probes and stored in alternating elements of an input buffer. 

M. J. Crochet et al. POLYFLOW A Multi-Purpose Finite Element Program for Continuous Polymer Flow, in K. T. O Brien, ed.. Computer Modeling for Extrusion and Other Continuous Polymer Processes, Hanser, New York, 1992. 

In order to identify EPHs of the cell or electrode reactions from the experimental information, there had been two principal approaches of treatments. One was based on the heat balance under the steady state or quasi-stationary conditions [6,11, 31]. This treatment considered all heat effects including the characteristic Peltier heat and the heat dissipation due to polarization or irreversibility of electrode processes such as the so-call heats of transfer of ions and electron, the Joule heat, the heat conductivity and the convection. Another was to apply the irreversible thermodynamics and the Onsager s reciprocal relations [8, 32, 33], on which the heat flux due to temperature gradient, the component fluxes due to concentration gradient and the electric current density due to potential gradient and some active components transfer are simply assumed to be directly proportional to these driving forces. Of course, there also were other methods, for instance, the numerical simulation with a finite element program for the complex heat and mass flow at the heated electrode was also used [34]. 

Optimize wall thicknesses, position and number of the gates to result in a uniform and inclusion- free flow front progress. Therefore, it is essential to perform a rheological analysis with finite elements. Several experienced simulation programs for example Cadmould or Moldflow can be used for this application. 

The application software is programmed for the manual as well as for the fully automatic measurement mode and supports the analyst in the development and optimization of methods for HR-CS AAS. In addition to the well-known software options of LS AAS, the fast wavelength/element change for flame operation offers a rapid sequential multielement determination for up to 20 arbitrarily selectable elements using a constant sample flow. The spectral environment can be visualized and evaluated by the analyst during the measurement cycle. 

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