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FARKLI SOĞUK DUVAR SICAKLIKLARININ OSİLASYONLU YÜZEY GERİLİM KONVEKSİYONA GEÇİŞE ETKİLERİ

EFFECTS OF TRANSITION TO OSCILATORY THERMOCAPILLARY CONVECTION UNDERVARIOUS COLD WALL TEMPERATURES

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Abstract (2. Language): 
In this study, the transition from the steady to oscillatory thermocapillary convection flow of a rectangular container configuration under various cold wall temperatures effects have been investigated experimentally. Steady flow and temperature oscillations were observed under various conditions using 5 cSt silicone oil as a test fluid. The critical temperature differences were measured for various conditions and flow patterns were observed by a microscope system. The effect of heat transfer from the liquid free surface to surrounding air on the onset of the oscillations was investigated.
Abstract (Original Language): 
Bu çalışmada, dikdörtgen kap konfigürasyonu içerisindeki akışkanın farklı soğuk duvar sıcaklıkları altında kararlı yüzey gerilim konveksiyondan osilasyonlu yüzey gerilim konveksiyona geçişi deneysel olarak araştırılmıştır. Deney akışkanı olarak kinematik viskozitesi 5 cSt olan silikon yağı kullanılmış ve bu akışkanın farklı şartlar altında kararlı akış ve sıcaklık osilasyonları incelenmiştir. Farklı şartlar için kritik sıcaklık farkı ölçülmüş ve akış şekilleri mikroskop sistemi sayesinde gözlenmiştir. Akışkanın serbest yüzeyinden ortama olan ısı kaybının osilasyona başlama noktasına olan etkisi araştırılmıştır.

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