Computational Features of Flow Modeling in Nanostructured Sensors

Abstract

Nowadays the productivity of the welding processes represents an important factor in economy concepts. The technologies which are developed by the researchers are oriented to the increasing of the welding processes' productivity and to the improvement of the products' quality.This paper aims to present some recent results in modeling fluids behavior in a new type of sensor dedicated to the hybrid welding. The laser-arc hybrid welding is formed by two individual processes, laser welding and arc welding. The main advantage of this process is represented by the synergic effect obtained due to the putting together of the two heat sources. It means that the most important welding parameters are higher than the considered sum of the parameters of the two processes in individual consideration [5]. It is exhibited a qualitative analysis of the circulation variation of the magnetic liquid on the inner of the sensor. The standpoint is the variation of the energy functional for the liquid circulation in the sensor, with respect to the centre angles. The expression v=v(x,t) was parameterized with respect to time and multiple simulations were realized for short discrete time units, depending on the inner and outer radius of the torus. The Maplell soft offers very few possibilities for realizing discrete numerical simulations. For this case some specific procedures were adequate, namely the "multiinf' procedure from a multivariate calculus package and the "interactive" plot builder. Testing these procedures offered very accurate and useful information concerning the relative angular position of the two welding heads, one relative to the other, during the sensor activity. It is outlined the advantage of using the interactive plot builder.

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“…The main advantage of this process is represented by the synergic effect obtained due to the putting together of the two heat sources. It means that the most important welding parameters are higher than the considered sum of the parameters of the two processes in individual consideration [1,2] Intelligent flows with magnetic behavior -the so called "Ferro fluids" are ultra sensitive gel with magnetic properties, having three basic components [2]:…”