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  • 1
    Language: English
    In: PCI-Paint and Coatings Industry, 2018, Vol.2018(April), pp.urn:issn:0884-3848
    Description: A simple rheological method based on a novel measuring system has been presented that enables the investigation in drying behavior of aqueous paints. The method has been successfully tested in the characterization in drying behavior of four commercial polymer dispersions and also in the investigation of the effect of two additives on the drying process of polymer dispersions.
    Keywords: Rheology ; Testing ; Chemistry(All) ; Surfaces, Coatings And Films ; Marketing
    ISSN: 0884-3848
    Source: NARCIS (National Academic Research and Collaborations Information System)
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  • 2
    Language: English
    In: High Temperatures-High Pressures, 2001, Vol.33(6), pp.659-668
    Keywords: Engineering ; Chemistry ; Physics;
    ISSN: 0018-1544
    E-ISSN: 1472-3441
    Source: CrossRef
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  • 3
    Language: German
    In: Chemie Ingenieur Technik, April 2000, Vol.72(4), pp.355-359
    Description: Die Kenntnis von Geschwindigkeitsfeldern ist von Bedeutung für die Verifikation numerischer Simulationen und trägt, zusammen mit der Auswertung der Dynamik von Wirbelstrukturen, zu einem tieferen Verständnis der dynamischen Vorgänge in Flammen bei. In diesem Zusammenhang wird eine FPC-Methode (Interferenzstreifenmuster-Korrelationsanalyse; Fringe Pattern Correlation) zur Berechnung der transienten Geschwindigkeitsfelder aus momentanen Interferenzstreifenmustern vorgestellt. Damit werden die transienten Geschwindigkeitsfelder einer Mathanol-Tankflamme berechnet und mit Messungen anderer Arbeitsgruppen verglichen. Um die zeitliche Evolution von Wirbelstrukturen in der Flamme zu verfolgen, werden aus den transienten Geschwindigkeitsfeldern Wiirbestärkefelder berechnet. Für die Messungen wurde ein holographischer Echtzeit-Durchlichtinterferometer eingesetzt. Die Meßergebnisse sind mit denen anderer Meßmethoden vergleichbar. Mit der FPC-Methode lassen sich für Tankflammen vieler Brennstoffe transiente Geschwindigkeitsfelder bestimmen, bei denen andere optische Methoden aufgrund der VIS-Strahlung der Flamme nicht anwendbar sind.
    Keywords: Interferometer ; Interferenzstreifen ; Korrelationsanalyse ; Transienter Zustand ; Wirbelstärke ; Flamme ; Geschwindigkeitsverteilung ; Flammausbreitungsgeschwindigkeit ; Strömungsfeld ; Bildverarbeitung ; Medicine ; Engineering ; Chemistry;
    ISSN: 0009-286X
    E-ISSN: 1522-2640
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  • 4
    Language: English
    In: High Temperatures-High Pressures, 1997, Vol.29(4), pp.397-404
    ISSN: 0018-1544
    E-ISSN: 1472-3441
    Source: CrossRef
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  • 5
    Language: German
    In: Nachrichten aus der Chemie, February 2006, Vol.54(2), pp.149-150
    Description: Um reproduzierbar rheologisch zu messen, ist bei Probenvorbereitung und Auswertung besondere Sorgfalt erforderlich. Mini‐Spritzgussmaschinen verringern Fehlerquellen bei der Probenvorbereitung.
    Keywords: Polymer ; Rheologie ; Analytik ; Spritzgussmaschine ; Probenvorbereitung ; Spektralphotometrie ; Ftir-Spektroskopie ; Uv-Spektroskopie ; Reproduzierbarkeit ; Chemistry;
    ISSN: 1439-9598
    E-ISSN: 1868-0054
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  • 6
    Language: English
    In: High Temperatures-High Pressures, 1999, Vol.31(2), pp.173-186
    ISSN: 0018-1544
    E-ISSN: 1472-3441
    Source: CrossRef
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  • 7
    Language: English
    In: High Temperatures-High Pressures, 2000, Vol.32(1), pp.73-81
    ISSN: 0018-1544
    E-ISSN: 1472-3441
    Source: CrossRef
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  • 8
    Language: English
    In: The XV International Congress On Rheology: The Society of Rheology 80th Annual Meeting, Monterey (California) (3–8 August 2008):
    In: AIP Conference Proceedings, 07 July 2008, Vol.1027(1), pp.1202-1204
    Description: As the trend for future crude oil reservoirs goes towards more and more extreme depths, the requirements for enhanced oil recovery become more sophisticated. This is due to the fact that one has to face not only extremely elevated temperatures and pressures, but the crude oil itself exhibits a high content of high molecular weight hydrocarbons. As these hydrocarbons contain different functional groups like paraffins and asphaltines they are prone to show pronounced waxy crystallization during later transportation processes. Hence the rheological properties of the crude oil itself as well as supporting fluids used in the process, e.g. drilling fluids, have to be monitored for the whole process cycle, from the well to the refinery. Whereas the rheological properties in the reservoir is dominated by the salinity, temperature and pressure, all of which can be simulated in the measuring cell of a rheometer, the rheological properties during the actual transportation is a completely different challenge. One of the major issues is the enormous volume of the oil itself that has to flow through a pipeline. As crude oil always contains a high amount of high molecular weight saturated hydrocarbons it will show a tendency to precipitate or “wax” while the oil cools down being pumped to the surface. The precipitated wax may cause partial congestion of the pipeline which again can lead to a significant pressure drop. Trying to reduce this waxy crystallisation by insulating or even heating the pipeline requires tremendous financial efforts, requiring more pumps, heating elements or additives. The complete transportation cycle of a crude oil, starting at the drilling site, leading through the pipeline (which may cover diverse climatic zones) before finally reaching the refinery, can be simulated with a rotational rheometer by implementing time profiles of distinct shear rates, temperatures and pressures. Moreover, the formation of wax can be measured under shear by means of optical microscopy, providing rheological data and microscopic images simultaneously. Even in a pipeline accident, Rheology can help providing the answers on how to recover the oil with minimum environmental damage.
    Keywords: Materials Physics and Applications
    ISBN: 978-0-7354-0549-3
    ISSN: 0094-243X
    E-ISSN: 1551-7616
    Source: © 2008 American Institute of Physics (AIP)〈img src=http://exlibris-pub.s3.amazonaws.com/AIP_edited.gif style="vertical-align:middle;margin-left:7px"〉
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