{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,17]],"date-time":"2025-12-17T18:04:20Z","timestamp":1765994660171,"version":"build-2065373602"},"reference-count":30,"publisher":"MDPI AG","issue":"24","license":[{"start":{"date-parts":[[2019,12,4]],"date-time":"2019-12-04T00:00:00Z","timestamp":1575417600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia (FCT), COMPETE and FEDER","award":["MIT-EXPL\/IRA\/0077\/2017 (FERRO-CLEAN)","POCI-01-0145-FEDER-030765 (RheoOptimized2DInks)."],"award-info":[{"award-number":["MIT-EXPL\/IRA\/0077\/2017 (FERRO-CLEAN)","POCI-01-0145-FEDER-030765 (RheoOptimized2DInks)."]}]},{"name":"Programa de Fomento e 293 impulso de la actividad investigadora de la Universidad de C\u00e1diz","award":["2018\/19"],"award-info":[{"award-number":["2018\/19"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Applied Sciences"],"abstract":"<jats:p>Uniaxial extensional flow is a canonical flow typically used in rheological characterization to provide complementary information to that obtained by imposing simple shear flow. In spite of the importance of having a full rheological characterization of complex fluids, publications on the rheological characterization of mobile liquids under extensional flow have increased significantly only in the last 20 years. In the case of the rheological characterization of electrorheological fluids, the situation is even more dramatic, as the ERFs have been exclusively determined under simple shear flow, where an electrorheological cell is attached to the rotational rheometer generating an electric field perpendicular to the flow direction and that does not allow for inverting the polarity. The very recent work published by Sadek et al., who developed a new electrorheological cell to be used with the commercial Capillary Breakup Extensional Rheometer (CaBER), allows for the very first time performing electrorheometry under extensional flow. By means of the same experimental setup, this study investigates the influence of the polarity of the imposed electric field on the filament thinning process of a Newtonian and an electrorheological fluid. Results show that a polarity against the gravity results in filament thinning processes that live longer or reach a stable configuration at lower intensities of the applied electric field.<\/jats:p>","DOI":"10.3390\/app9245273","type":"journal-article","created":{"date-parts":[[2019,12,5]],"date-time":"2019-12-05T03:16:36Z","timestamp":1575515796000},"page":"5273","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Influence of the Polarity of the Electric Field on Electrorheometry"],"prefix":"10.3390","volume":"9","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0670-8109","authenticated-orcid":false,"given":"J.","family":"Garc\u00eda-Ortiz","sequence":"first","affiliation":[{"name":"Departamento de Ingenier\u00eda Mec\u00e1nica y Dise\u00f1o Industrial, Escuela Superior de Ingenier\u00eda, Universidad de C\u00e1diz, Av. Universidad de C\u00e1diz, 10, Puerto Real, 11519 C\u00e1diz, Spain"}]},{"given":"Samir","family":"Sadek","sequence":"additional","affiliation":[{"name":"Departamento de Engenharia Mec\u00e2nica, Centro de Estudos de Fen\u00f3menos de Transporte (CEFT), Faculdade de Engenharia da universidade do Porto, Rua Dr. Roberto Frias s\/n, CP4200-465 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9763-6854","authenticated-orcid":false,"given":"Francisco","family":"Galindo-Rosales","sequence":"additional","affiliation":[{"name":"Departamento de Engenharia Qu\u00edmica, Centro de Estudos de Fen\u00f3menos de Transporte (CEFT), Faculdade de Engenharia da universidade do Porto, Rua Dr. Roberto Frias s\/n, CP4200-465 Porto, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2019,12,4]]},"reference":[{"key":"ref_1","unstructured":"Winslow, W. (1947). Method and Means for Translating Electrical Impulses into Mechanical Force. 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