A summary of new predictive high frequency thermo-vibrational models in porous media

In this chapter, we consider the effect of mechanical vibration on the onset of convection in porous media. The porous media is saturated either by a pure fluid or by a binary mixture. The importance of transport model on stability diagrams are presented and discussed. The stability threshold for the Darcy-Brinkman case in the RaTc-R and kc-R diagrams are presented (where RaTc, kc and R are the critical Rayleigh number, the critical wave number and the vibration parameters respectively). It is shown that there is a significant deviation from the Darcy model. In the thermo-solutal case with the Soret effect, the influence of vibration on the reduction of multi-cellular convection is emphasized. A new analytical relation for obtaining the threshold of mono-cellular convection is derived. This relation shows how the separation factor Ψ is related to controlling parameters of the problem, Ψ = f (R, ε*, Le) when the wave number k -> 0. The importance of vibrational parameter definition is highlighted and it is shown how, by using a proper definition for vibrational parameter, we may obtain compact relationship. It is also shown how this result may be used to increase components separation

Evaluating transport in irregular pore networks

A general approach for investigating transport phenomena in porous media is presented. This approach has the capacity to represent various kinds of irregularity in porous media without the need for excessive detail or computational effort. The overall method combines a generalized effective medium approximation (EMA) with a macroscopic continuum model in order to derive a transport equation with explicit analytical expressions for the transport coefficients. The proposed form of the EMA is an anisotropic and heterogeneous extension of Kirkpatrick's EMA which allows the overall model to account for microscopic alterations in connectivity (with the locations of the pores and the orientation and length of the throat) as well as macroscopic variations in transport properties. A comparison to numerical results for randomly generated networks with different properties is given, indicating the potential for this methodology to handle cases that would pose significant difficulties to many other analytical models

Die Neue Rechte in der Sozialen Arbeit in NRW: Exemplarische Analysen

Die Neue Rechte in der Sozialen Arbeit in NRW - exemplarische Analysen Soziale Arbeit ist eng mit gesellschaftlichen Entwicklungen verbunden. Auch wenn Selbstverständnis und Positionierungen von Profession und Disziplin häufig den Anspruch erheben, neurechten Entwicklungen entgegen zu treten, können sie sich von den aktuellen gesellschaftlichen Verschiebungen in Richtung einer Normalisierung von rechtsnationalen Positionen nicht frei machen. Auf der Basis einer Fragebogenerhebung, einer Expert_innenbefragung und einer Dokumentenanalyse werden das Vorkommen, die Formen und die Strategien der Neuen Rechten in der Sozialen Arbeit in NRW untersucht. Dabei werden sowohl alle Regionen als auch alle Arbeitsbereiche der Sozialen Arbeit berücksichtigt und exemplarische Analysen zum Vorkommen vorgenommen. Auf der Basis der dadurch gewonnenen Daten können sowohl eigene Angebote als auch Einflussnahmen von außerhalb wie innerhalb etablierter Angebote Sozialer Arbeit durch extrem rechte Akteure ausgemacht werden. Dabei wird häufig an Themen angeknüpft, die Anschluss an ethnopluralistische und rassistische, antifeministische oder völkisch-nationale ideologische Narrative ermöglichen. Einfluss- und Landnahmeversuche finden sich in allen Regionen von NRW und vielen verschiedenen Arbeitsfeldern.The Far Right in Social Work of North-Rhine Westphalia - exemplary analyses Social Work is strongly interconnected with societal developments. Even though self-positioning of profession and discipline frequently claim to fight against racist or illiberal ideas in society, they cannot assert to be free of the current normalization of nationalistic and authoritarian positions. On the basis of a questionnaire survey, structured expert interviews and a document analysis, occurrence, forms and strategies of the far right in the social sector of North-Rhine Westphalia are examined. All the regions of that German federal state as well as different fields of social work are incorporated, on which exemplary analyses are realized. On that base, own “social” activities by the far right can be detected as well as exertions of influence from outside and inside of the established social work institutions. These activities often tie on topics which can be connected to ethno-pluralist, racist, anti-feminist or nationalistic narratives. Exertions of influence take place over all regions and fields of social work