Nano Mineralojik Akışkanların Termofiziksel Özelliklerinin Deneysel Olarak İncelenmesi

Year 2019, Volume: 22 Issue: 3, 619 - 626, 01.09.2019

Uğur Karakaya Metin Gürü Adnan Sözen Duygu Y. Aydın İbrahim Bilici

https://doi.org/10.2339/politeknik.432034

Cited By: 2

Abstract

Bu çalışmada
bentonit, diatomit, sepiyolit ve klinoptilolit malzemeleri içeren nanoakışkanların
termofiziksel özellikleri belirlenmiştir. Spex tipi yüksek enerjili öğütücü
kullanılarak 50 nm boyutunda nano parçacıklar üretilmiştir. Bu nano parçacıklar
kullanılarak kütlece % 2 mineralojik malzeme ve kütlece % 0,5 Sodyum Dodesil
Benzen Sülfonat içeren nanoakışkanlar 5 saat ultrasonik karıştırma sonucunda
hazırlanmıştır. Termofiziksel özelliklerden olan ısıl iletkenlik, özgül ısı ve
viskozite ölçümleri deneysel olarak gerçekleştirilmiştir. Mineral
nanoakışkanlar içerisinde en büyük ısıl iletkenlik ve özgül ısı artışının
bentonit içeren nanoakışkan ile elde edilmiştir. Bentonit içeren naoakışkanın
askıda bulunan nano parçacık miktarının daha fazla olması nedeniyle diğer
mineralojik nanaoakışkanlara göre ısıl iletkenlik ve özgül ısı diğerlerinin
daha yüksek olduğu sonucuna varılmıştıır. Nanoakışkanlar içerisinde bulunan
nano parçacıkların oluşturduğu parçacık-parçacık etkileşimi nedeniyle akışa
karşı oluşan direncin arttığı, sonuç olarak saf suya kıyasla viskozitenin
arttığı gözlemlenmiştir. 

Keywords

Nanoakışkan, özgül ısı, ısıl iletkenlik

Experimental Investigation of Thermophysical Properties of Nano Mineralogical Fluids

Abstract

In this study, the
thermophysical properties of nanoparticles containing bentonite, diatomite, sepiolite
and clinoptilolite materials were determined. Nano particles with a size of 50
nm were produced using a Spex type high-energy mill. Using these nanoparticles,
nanoparticles containing 2% mineralogical material and 0.5% Sodium Dodecyl
Benzene Sulfonate by mass were prepared by ultrasonic mixing for 5 hours. The
thermal conductivity, specific heat and viscosity measurements from
thermophysical properties have been experimentally measured. The greatest
thermal conductivity and specific heat increase in the mineral nano-powders
were obtained with the bentonite-containing nanofluid. It is concluded that the
nano flux containing bentonite has higher thermal conductivity and specific
heat than the other mineralogical nano-fluids because the amount of suspended
nano particles is higher. It has been observed that the resistance to flow
increases due to the particle-particle interaction generated by the
nanoparticles in the nanofluids, resulting in an increase in viscosity compared
to pure water.

Keywords

nanofluids, specific heat, thermal conductivity

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