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Rheologica Acta

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11.09.2018 | Original Contribution

Non-monotonic response of waxy oil gel strength to cooling rate

verfasst von: Diogo E. V. Andrade, Moisés A. Marcelino Neto, Cezar O. R. Negrão

Erschienen in: Rheologica Acta | Ausgabe 10/2018

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Abstract

The oil at high temperatures in the reservoir loses heat to the surroundings and is submitted to different shear stresses while it is produced and transported. Thermal and shear histories have great influence on the rheological characteristics of waxy oils at low temperature. Wax crystals precipitate during cooling, building up a percolated matrix that entraps the oil and consequently, forms a gel-like structure. One of the main parameters that affect the crystals’ morphology and therefore the gel strength is the cooling rate. Although the oil static cooling has been widely studied in the literature, many questions are still open. The current work analyzes the influence of the cooling rate on the gel strength and on the dynamic moduli (G′ and G″) of a waxy model oil. Microscopic images of wax crystals were obtained and a hypothesis to explain the non-monotonic response of the rheological parameters as a function of the cooling rate is proposed based on the crystals’ morphology.

Vorheriger Artikel Hydrodynamic properties of squirmer swimming in power-law fluid near a wall

Nächster Artikel Rheological properties and self-assembled structures of a newly synthesized organogelator: cyclohexane carboxamido-2C8/oleyl in different solvent oils

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Titel: Non-monotonic response of waxy oil gel strength to cooling rate
verfasst von: Diogo E. V. Andrade
Moisés A. Marcelino Neto
Cezar O. R. Negrão
Publikationsdatum: 11.09.2018
Verlag: Springer Berlin Heidelberg
Erschienen in: Rheologica Acta / Ausgabe 10/2018
Print ISSN: 0035-4511
Elektronische ISSN: 1435-1528
DOI: https://doi.org/10.1007/s00397-018-1108-6

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