A suitable mixing technology for every application (Part 1) / Joachim Schöck in ADHESION - ADHESIVES + SEALANTS, Vol. 20, N° 4/2023 (2023)  

[article]  inADHESION - ADHESIVES + SEALANTS > Vol. 20, N° 4/2023 (2023) . - p. 30-35 Titre : A suitable mixing technology for every application (Part 1) Type de document : texte imprimé Auteurs : Joachim Schöck, Auteur Année de publication : 2023 Article en page(s) : p. 30-35 Langues : Multilingue (mul) Catégories : Cisaillement (mécanique) Colles bi-composante:Adhésifs bi-composant Ecoulement laminaire Malaxeurs et mélangeurs Mastics bi-composant Mélanges (chimie) Rhéologie Index. décimale : 668.3 Adhésifs et produits semblables Résumé : 2-component adhesives and sealants are currently gaining more and more importance in the fields of dentistry, industry, and healthcare. These materials must be mixed efficiently and reproducibly prior to application. This article focuses on the core competency of mixing technology and on what needs to be considered when selecting the appropriate mixing system for the respective application. Part one provides an introduction to mixing technology and evaluation criteria for its efficiency. In addition, the influence of rheology on the mixing behavior of static mixers is examined. Note de contenu : - Mixing principles in laminar flow regimes - Implementation of mixing principles - Evaluation of the mixing efficiency of static mixers - Mixing quality - Material guideline to achieve good mixing resluts - Special mixer geometries for materials with challenging rheology - Fig. 1 : Laminar flow and turbulent flow - Fig. 2 : Illustration of dispersive and convective mixing - Fig. 3 : Different mixer designs and their mixing principles - Fig. 4 : X-Grid mixer design and its mixing principle - Fig. 5 : Average shear strain rate in a mixer over its pressure loss - Fig. 6 : Selection of the optimum mixer type - Fig. 7 : Blueline mixer and X-Grid mixer - Table 1 : Categorization of characteristics - Table 2 : Rheological classification of materials En ligne : https://drive.google.com/file/d/1rvk-PeKPbUjz1NMP5YbzC5Yy6Qdc9qWF/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40160 [article]

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A suitable mixing technology for every application (part 2) / Joachim Schöck in ADHESION - ADHESIVES + SEALANTS, Vol. 21, N° 1/2024 (2024)  

[article]  inADHESION - ADHESIVES + SEALANTS > Vol. 21, N° 1/2024 (2024) . - p. 22-25 Titre : A suitable mixing technology for every application (part 2) Type de document : texte imprimé Auteurs : Joachim Schöck, Auteur Année de publication : 2024 Article en page(s) : p. 22-25 Langues : Multilingue (mul) Catégories : Adhésifs à usages médicaux Colles bi-composante:Adhésifs bi-composant Malaxeurs et mélangeurs Mélanges (chimie) Simulation par ordinateur Index. décimale : 668.3 Adhésifs et produits semblables Résumé : 2-component adhesives and sealants are currently gaining more and more importance in the fields of dentistry, industry, and healthcare. These materials must be mixed efficiently and reproducibly prior to application. This article focuses on the core competency of mixing technology and on what needs to be considered when selecting the appropriate mixing system for the respective application. Part 2 of this series of articles compares static and dynamic mixing systems and discusses the advantages of dynamic mixers. In addition, an insight into the numerical flow simulation of mixers and their validation is given. Note de contenu : - Advantages of dynamic mixers - Applications of dynamic mixing systems - Usage of dynamic mixers - Numerical flow simulation of mixers - Introduction to CFD - Pre-processing - Geometry preparation and simplification - Discretization - Physical models - Boundary condition and fluid properties - Execution of the simulation - Postprocessing - Advantages of CFD in comparison with measurements - Fig. 1 : Typical mixing patterns in static (left) versus a dynamic mixer (right). Dynamic mixing allows multi-directional mixing and dispersion. - Fig. 2 : Rheological behavior of a typical shear-thinning material. The light blue and grey area indicate typical shear rates of static and dynamic mixers. - Fig. 3 : Examples of dynamic mixers - Fig. 4 : Process of geometry preparation and discretization - Fig. 5 : Convective form of the Navier-Stokes momentum equation - Fig. 6 : Mixing quality in a static mixer En ligne : https://drive.google.com/file/d/1HLAppQHSnrNYiulofc1NnXXzl6BNtrWx/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40614 [article]

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