Simulando escoamentos em um micromisturador: um estudo numérico no contexto da separação de operadores via o método do tubo de trajetórias

Abstract

In recent years with advances in microfluidic technology and Lab-On-a-Chip, have led to an increased interest in laminar fluid mixing. In several areas of knowledge, there are situations in which small volumes of products need to be simulated, among which physical, chemical, biological and medical analyzes can be mentioned. In this context a greater contact is required between the sample and the reagent used in order to achieve a homogeneity of the mixture. In view of this scenario, the application of micromistradores, which allow a fast and efficient mixing in a variety of tasks, ranging from mixtures to thermal exchanges. The objective of this work is to apply the operator separation technique to solve the convection-diffusion equation that models an annular micromixer. The approach is based on the separation of the two terms that compose this equation. The convective term of the equation will be solved using the Trajectory Tube method and the Stabilized Bi-Conjugate Gradient (BiCGStab) method is used to solve the diffusive term. And, consequently, the best mixing time for different channel thicknesses is found and determines the channel thickness which provides the best mixing process.