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SABİT SICAKLIK KONFİGÜRASYONUNDA ORTAM SICAKLIĞI VE SOĞUK DUVAR SICAKLIĞININ OSİLASYONLU YÜZEY GERİLİM HAREKETİNE GEÇİŞE ETKİLERİ

EFFECT OF AMBIENT AIR TEMPERATURE AND COLD WALL TEMPERATURE ON ONSET OF OSCILLATORY THERMOCAPILLARY FLOW IN CONSTANT TEMPERATURE CONFIGURATION

Journal Name:

  • Süleyman Demirel Üniversitesi Fen Dergisi

Publication Year:

  • 2008

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
In this research, steady and oscillatory thermocapillary flows of high Prandtl number fluids were investigated experimentally under normal gravity in Constant Temperature Configuration by heating from center and cooled from side wall of a cylindrical container with 30 mm diameter. Flow and temperature oscillations were observed under various conditions using 5 cSt silicone oil in the test fluid. The effect of heat transfer from the liquid free surface to surrounding air, ambient air temperatures, and cold wall temperatures on the onset of the oscillations was investigated.
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Abstract (Original Language): 
Bu araştırma, Sabit Sıcaklık Konfigürasyonunda, yüksek Prandtl sayısına sahip, silindirik bir kaptaki akışkanın kararlı ve osilasyonlu yüzey gerilimli akış hareketi deneysel olarak araştırılmıştır. Deney akışkanı, 30 mm çapındaki deney silindirinin simetri eksenine yerleştirilen silindirik bakır çubuk tarafından ısıtılmış ve deney silindirinin dış kenarına sarılan bakır boru içerisinden geçen su ile soğutulmuştur. Deney akışkanı olarak kinematik viskozitesi 5 cSt olan silikon yağı kullanılarak belli şartlar altında akış hareketleri ve sıcaklık osilasyonları gözlenmiştir. Akışkanın serbest yüzeyinden ortama olan ısı kaybının, farklı ortam sıcaklıklarının ve farklı soğuk duvar sıcaklıklarının kararlı haldeki akışkan hareketinin periyodik osilasyonlu akış hareketine başlama noktasına etkileri araştırılmıştır.
FULL TEXT (PDF): 
PDF icon arastirmax-sabit-sicaklik-konfigurasyonunda-ortam-sicakligi-soguk-duvar-sicakliginin-osilasyonlu-yuzey-gerilim-hareketine-gecise-etkileri.pdf
  • 2
191-204
  • Turkish

REFERENCES

References: 

CHUN CH, WUEST W, 1978. A Micro-Gravity Simulation of Marangoni Convection.
Acta Astronautica, 5, 9, 681-686. KAMOTANI Y, OSTRACH S, VARGAS M, 1984. Oscillatory Thermocapillary Flow
in A Simulated Floating-Zone Convection Configuration. Journal of Crystal
Gowth, 66, 83-90.
203
Ç. ÇIRAK,
R
. SELVER, N. ÖZEK
KAMOTANI Y, OSTRACH S, 1988. Theoretical Analysis of Thermocapillary Flow in Cylindrical Columns of High Prandtl Number Fluids. Journal of Heat Transfer,
120, 758-764.
KAMOTANI Y, LEE JH, OSTRACH S, PLINE A, 1992. An Experimental Study of Oscillatory Thermocapillary Convection in Cylindrical Containers. Physics of
Fluids A, 4, 5, 955-962.
KAMOTANI Y, WANG L, HATTA S, SELVER R, YODA S, 2001a. Effect of Free Surface Heat Transfer on Onset of Oscillatory Thermocapillary Flow of High Prandtl Number Fluid. Journal of The Japan Society of Microgravity
Application, 18, 4, 283-288.
KAMOTANI Y, WANG L, HATTA S., SELVER R, BHUNIA P. S, AND YODA S, 8¬11 January 2001b Effect of Cold Wall Temperature on Onset of Oscillatory Thermocapillary Flow, 39 th AIAA Aerospace Sciences Meeting & Exhibit,
Reno, NV.
LAVALLEY R, AMBERG G, ALFREDSSON H, 2001. Experimental and Numerical Investigation of Nonlinear Thermocapillary Oscillations in An Annular Geometry. Europen Journal of Mechanics B-Fluids, 20, 771-797. OSTRACH S, 1977. Motion Induced by Capillarity. Physiochemical Hydrodynamics,
2, 571-589.
OSTRACH S, 1979. Convection due to Surface-Tension Gradients. (COSPAR) Space
Research, 19, 563-570.
PIMPUTKAR SM, OSTRACH S, 1981. Convective effects in crystals grown from
melt. Journal of Crystal Growth, 55, 614-646. SCHWABE D, SCHARMANN A, PREISSER F, OEDER R, 1978. Experiments on Surface Tension Driven Flow in Floating Zone Melting. Journal of Crystal Growth, 43, 305-312.
SCHWABE D, 1981. Marangoni effects in crystal growth melt. Physico-Chemical
Hydrodynamics, 2 (4), 263-280. SELVER R, 2005. Experiment on the Transition from the Steady to the Oscillatory Marangoni Convection of a Floating-Zone under Various Cold Wall Temperatures and Various Ambient Air Temperature Effects. Microgravity Science and Tecnology, 17, 25-35.

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