A two-fluid continuum model is developed to describe mass transport in electro- and magnetorheological suspensions. The particle flux is related to the field-induced stresses. Solutions of the resulting mass balance show column formation in the absence of flow, and stripe formation when a suspension is subjected simultaneously to an applied electric field and shear flow.
A two-fluid continuum model is developed to describe mass transport in electro-and magnetorheological suspensions. The particle flux is related to the field-induced and hydrodynamic stresses. Solutions of the resulting mass balance show column formation in the absence of flow and stripe formation when a suspension is subjected simultaneously to an applied electric field and shear flow.
The electrostatic dipole moment distribution in heterogeneous suspensions is determined via a self-consistent, point-dipole model, which incorporates nonlocal electrostatics. Predictions agree qualitatively with previous asymptotic results for discontinuous concentration profiles. For small fluctuations in concentration, the dipole strength can be expressed as an expansion in gradients of the concentration. This expansion is incorporated into a linearized continuum model for structure evolution in sheared electrorheological suspensions. Prior stability analysis of a fully local continuum model predicts the formation of concentrated particle stripes oriented in the flow direction, in agreement with experimental observations. Incorporating nonlocal electrostatics suppresses the growth of high wave number fluctuations, providing a more realistic finite rate of growth of fluctuations. Incorporating nonlocal electrostatics in the full nonlinear continuum model produces a single particulate stripe at steady state.
In diesem Beitrag wird im ersten Teil ein systematisches Vorgehen zur Identifikation des Luftpfades (Luft-und Abgastrakt) von Dieselmotoren auf Basis einer dynamischen Motorvermessung vorgestellt. Dafür werden lokal lineare Modelle mit Ausgangsfehlerschätzung verwendet. Mit dem identifizierten Modell erfolgt im zweiten Teil eine automatisierte Parametrisierung der Luftmassenstrom-und Ladedruckregelung.A systematic procedure is introduced for the identification of the air path (air-and exhaust manifold) of diesel engines, by means of dynamic engine measurements. Local linear models in output error configuration are used. Furthermore, an automated calibration of the feedback-controllers is presented for the air mass flow and the charging pressure.Schlagwörter: Nichtlineare Identifikation, lokal lineare Modelle, Ausgangsfehler, Ladedruck-/Luftmassenstrom-Regelung
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.