{"id":7417,"date":"2026-03-31T23:11:39","date_gmt":"2026-03-31T20:11:39","guid":{"rendered":"https:\/\/neoberidhaber.kahveciyazilim.com\/?p=7417"},"modified":"2026-03-31T23:11:50","modified_gmt":"2026-03-31T20:11:50","slug":"sivilar-da-katilar-gibi-kirilabilir-drexel-universitesinden-akiskanlar-mekanigini-sarsacak-kesif","status":"publish","type":"post","link":"https:\/\/neoberidhaber.kahveciyazilim.com\/index.php\/2026\/03\/31\/sivilar-da-katilar-gibi-kirilabilir-drexel-universitesinden-akiskanlar-mekanigini-sarsacak-kesif\/","title":{"rendered":"S\u0131v\u0131lar da Kat\u0131lar Gibi K\u0131r\u0131labilir: Drexel \u00dcniversitesi’nden Ak\u0131\u015fkanlar Mekani\u011fini Sarsacak Ke\u015fif"},"content":{"rendered":"\n

Physical Review Letters dergisinde yay\u0131mlanan yeni bir Drexel \u00dcniversitesi \u00e7al\u0131\u015fmas\u0131, ak\u0131\u015fkanlar mekani\u011finin temel varsay\u0131mlar\u0131ndan birini alt\u00fcst ediyor: Basit s\u0131v\u0131lar, yeterince b\u00fcy\u00fck bir kuvvetle \u00e7ekildi\u011finde kat\u0131 bir madde gibi k\u0131r\u0131labiliyor.<\/p>\n\n\n\n

Ara\u015ft\u0131rma, ExxonMobil ile y\u00fcr\u00fct\u00fclen bir \u00e7al\u0131\u015fma s\u0131ras\u0131nda tamamen tesad\u00fcfen ortaya \u00e7\u0131kt\u0131. Hidrokarbon kar\u0131\u015f\u0131mlar\u0131n\u0131n reolojik \u00f6zelliklerini \u00f6l\u00e7en ekip, s\u0131v\u0131n\u0131n beklenmedik bi\u00e7imde ani ve sert bir “snap” sesiyle ikiye ayr\u0131ld\u0131\u011f\u0131n\u0131 g\u00f6zlemledi. Bu, daha \u00f6nce yaln\u0131zca kat\u0131 malzemelerde g\u00f6r\u00fclen “gevrek k\u0131r\u0131lma” davran\u0131\u015f\u0131yd\u0131 ve basit bir s\u0131v\u0131da hi\u00e7 g\u00f6zlemlenmemi\u015fti.<\/p>\n\n\n\n

Yap\u0131lan deneyler, bu k\u0131r\u0131lman\u0131n yakla\u015f\u0131k 2 megaPaskal’l\u0131k kritik bir gerilme noktas\u0131nda ger\u00e7ekle\u015fti\u011fini ortaya koydu. Farkl\u0131 viskozitelerdeki s\u0131v\u0131larla tekrarlanan testlerde her seferinde ayn\u0131 kritik gerilme de\u011ferine ula\u015f\u0131ld\u0131; bu da davran\u0131\u015f\u0131n kimyasal yap\u0131dan ba\u011f\u0131ms\u0131z ve muhtemelen su ve ya\u011f dahil t\u00fcm basit s\u0131v\u0131lara genellenebilir oldu\u011funa i\u015faret ediyor.<\/p>\n\n\n\n

\u015eimdiye kadar k\u0131r\u0131lma davran\u0131\u015f\u0131 yaln\u0131zca elastikiyet \u00f6zelli\u011fiyle ili\u015fkilendiriliyordu; oysa basit s\u0131v\u0131larda belirleyici bir elastik mekanizma bulunmuyor. Bu bulgu, viskozite etkisinin tek ba\u015f\u0131na kat\u0131 benzeri k\u0131r\u0131lma davran\u0131\u015f\u0131n\u0131 tetikleyebilece\u011fini g\u00f6steriyor. Ara\u015ft\u0131rmac\u0131lar, olay\u0131n k\u00f6keninde kavitasyon (s\u0131v\u0131 i\u00e7inde ani kabarc\u0131k olu\u015fumu ve \u00e7\u00f6k\u00fc\u015f\u00fc) olabilece\u011finden \u015f\u00fcpheleniyor. Sonu\u00e7lar; hidrolik sistemler, 3D yaz\u0131c\u0131lar ve kan damarlar\u0131 gibi viskoz s\u0131v\u0131 kullanan pek \u00e7ok uygulama alan\u0131 i\u00e7in yeni kap\u0131lar a\u00e7\u0131yor.<\/p>\n\n\n\n

Kaynak: Evrim A\u011fac\u0131<\/a><\/strong><\/p>\n\n\n\n

G\u00fcncelleme Tarihi:<\/strong> Mart 31, 2026 23:10<\/p>\n\n\n

<\/div>

Mahmut Can Yal\u00e7\u0131n<\/p><\/div><\/div>\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"Drexel University taraf\u0131ndan Physical Review Letters\u2019ta yay\u0131mlanan \u00e7al\u0131\u015fmaya g\u00f6re, basit s\u0131v\u0131lar yeterince g\u00fc\u00e7l\u00fc \u00e7ekildi\u011finde kat\u0131lar gibi \u201cgevrek \u015fekilde\u201d k\u0131r\u0131labiliyor. Yakla\u015f\u0131k 2 MPa gerilmede ortaya \u00e7\u0131kan bu davran\u0131\u015f\u0131n \u00e7o\u011fu s\u0131v\u0131 i\u00e7in ge\u00e7erli olabilece\u011fi d\u00fc\u015f\u00fcn\u00fcl\u00fcyor ve muhtemelen kavitasyon ile ili\u015fkili. Bu ke\u015fif, ak\u0131\u015fkanlar mekani\u011fi anlay\u0131\u015f\u0131n\u0131 de\u011fi\u015ftirip bir\u00e7ok teknolojik uygulamay\u0131 etkileyebilir.","protected":false},"author":6,"featured_media":7418,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_display_header_overlay":false,"csco_singular_sidebar":"","csco_page_header_type":"","csco_page_load_nextpost":"","csco_post_video_location":[],"csco_post_video_location_hash":"","csco_post_video_url":"","csco_post_video_bg_start_time":0,"csco_post_video_bg_end_time":0,"footnotes":""},"categories":[212,1],"tags":[],"class_list":["post-7417","post","type-post","status-publish","format-standard","has-post-thumbnail","category-bilim","category-genel","cs-entry","cs-video-wrap"],"_links":{"self":[{"href":"https:\/\/neoberidhaber.kahveciyazilim.com\/index.php\/wp-json\/wp\/v2\/posts\/7417","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/neoberidhaber.kahveciyazilim.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/neoberidhaber.kahveciyazilim.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/neoberidhaber.kahveciyazilim.com\/index.php\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/neoberidhaber.kahveciyazilim.com\/index.php\/wp-json\/wp\/v2\/comments?post=7417"}],"version-history":[{"count":1,"href":"https:\/\/neoberidhaber.kahveciyazilim.com\/index.php\/wp-json\/wp\/v2\/posts\/7417\/revisions"}],"predecessor-version":[{"id":7419,"href":"https:\/\/neoberidhaber.kahveciyazilim.com\/index.php\/wp-json\/wp\/v2\/posts\/7417\/revisions\/7419"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/neoberidhaber.kahveciyazilim.com\/index.php\/wp-json\/wp\/v2\/media\/7418"}],"wp:attachment":[{"href":"https:\/\/neoberidhaber.kahveciyazilim.com\/index.php\/wp-json\/wp\/v2\/media?parent=7417"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/neoberidhaber.kahveciyazilim.com\/index.php\/wp-json\/wp\/v2\/categories?post=7417"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/neoberidhaber.kahveciyazilim.com\/index.php\/wp-json\/wp\/v2\/tags?post=7417"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}