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In this study, we investigate how flow characteristics and channel design affect EVP fluid flow through a wavy channel, using numerical simulations supported by microfluidic experiments. Our results reveal that elasticity significantly influences flow dynamics, reducing pressure drops and expanding unyielded regions. Notably, we find that even minimal elasticity can shift the flow from steady to time-dependent regimes, a transition less pronounced in viscoelastic fluids. Additionally, we show that the development of stagnation regions can be prevented when using a modified EVP fluid with enhanced elasticity, thus providing a full global yielding of the material. This study elucidates the role of elasticity in modifying flow patterns and stress distribution within EVP fluids, offering insights into the optimization of industrial applications, such as the displacement of yield stress fluids in enhanced oil recovery, gas extraction, cementing, and other processes where flow efficiency is critical.<\/jats:p>","DOI":"10.1063\/5.0239451","type":"journal-article","created":{"date-parts":[[2024,11,19]],"date-time":"2024-11-19T13:07:40Z","timestamp":1732021660000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":6,"title":["The interplay of plasticity and elasticity in elastoviscoplastic flows in wavy channels"],"prefix":"10.1063","volume":"36","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3654-7940","authenticated-orcid":false,"given":"Mohamed S.","family":"Abdelgawad","sequence":"first","affiliation":[{"name":"Complex Fluids and Flows Unit, Okinawa Institute of Science and Technology Graduate University 1 , 1919-1 Tancha, Onna-son, Okinawa 904-0495,","place":["Japan"]}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1884-4100","authenticated-orcid":false,"given":"Simon J.","family":"Haward","sequence":"additional","affiliation":[{"name":"Micro\/Bio\/Nanofluidics Unit, Okinawa Institute of Science and Technology Graduate University 2 , 1919-1 Tancha, Onna-son, Okinawa 904-0495,","place":["Japan"]}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1222-6264","authenticated-orcid":false,"given":"Amy Q.","family":"Shen","sequence":"additional","affiliation":[{"name":"Micro\/Bio\/Nanofluidics Unit, Okinawa Institute of Science and Technology Graduate University 2 , 1919-1 Tancha, Onna-son, Okinawa 904-0495,","place":["Japan"]}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9004-2292","authenticated-orcid":false,"given":"Marco E.","family":"Rosti","sequence":"additional","affiliation":[{"name":"Complex Fluids and Flows Unit, Okinawa Institute of Science and Technology Graduate University 1 , 1919-1 Tancha, Onna-son, Okinawa 904-0495,","place":["Japan"]}]}],"member":"317","published-online":{"date-parts":[[2024,11,19]]},"reference":[{"key":"2024111913073326900_c1","doi-asserted-by":"publisher","first-page":"121","DOI":"10.1146\/annurev-fluid-010313-141424","article-title":"Yielding to stress: Recent developments in viscoplastic fluid mechanics","volume":"46","year":"2014","journal-title":"Annu. 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