Microfluidic flows of rough colloids
Başlık çevirisi mevcut değil.
- Tez No: 796260
- Danışmanlar: PROF. DR. LUCİO ISA
- Tez Türü: Yüksek Lisans
- Konular: Metalurji Mühendisliği, Metallurgical Engineering
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 2020
- Dil: İngilizce
- Üniversite: Eıdgenossısche Technısche Hochschule Zurıch (eth)
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Belirtilmemiş.
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: Belirtilmemiş.
Özet
Özet yok.
Özet (Çeviri)
The clogging of particle suspensions in a channel with a constriction is undesired for diverse technological applications. Several studies have focused on the parameters affecting the clogging characteristic such as flow velocity, particle concentration and channel geometries. This clogging can be seen as a local jamming under flow. Studies of shear-thickening suspensions have been focused to pinpoint the origin of such jamming transition. The effect of interparticle interactions, surface morphology and surface chemistry on the shear thickening of particle suspension has been shown in different studies. In this thesis, the effect of particle surface roughness on the clogging behavior of rough silica particle suspensions is investigated in a microfluidic channel with a constriction. For this purpose, particles with controlled surface roughness are produced. These particles are pumped through the constriction in the microfluidic channel in order to characterize clog formation. The characterization of the clogging events is done by measuring the particle volume fraction and local flow velocity in the channel. Suspensions of particles with five different roughness are examined in a wide range of velocities and volume fractions. A correlation between the particle surface roughness and clogging events has been observed. The suspensions of particles with rougher surfaces tend to clog at lower flow velocities. Particle agglomerations in the microfluidic channel have been noticed. The tendency for agglomeration increased with the particle surface roughness. The results identify surface roughness as a key parameter in triggering the undesired clogging events in the converging channels. Our findings indicate that surface roughness needs to be taken into consideration in the formulation of dense particulate suspensions for applications ranging from 3D printing to ink-jet printing.
Benzer Tezler
- 3-d numerical simulations of fluid flow and heat transfer in various micro conduits
Çeşitli mikrokanallardaki akışkan akışı ve ısı transferinin 3 boyutlu sayısal simülasyonu
METİN BİLGEHAN TURGAY
Doktora
İngilizce
2017
Makine MühendisliğiOrta Doğu Teknik ÜniversitesiMakine Mühendisliği Ana Bilim Dalı
DOÇ. DR. ALMILA GÜVENÇ YAZICIOĞLU
- Design and engineering of slippery liquid-infused porous surfaces by LbL technique for icephobic surfaces and hydrodynamic cavitation
Buzfobik yüzeyler ve hidrodinamik kavitasyon için LbL tekniği ile kaygan sıvı doldurulmuş gözenekli yüzeylerin tasarımı ve mühendisliği
ARAZ SHEIBANI AGHDAM
Doktora
İngilizce
2020
Mühendislik BilimleriSabancı ÜniversitesiMalzeme Bilimi ve Nanomühendislik Ana Bilim Dalı
DOÇ. DR. FEVZİ ÇAKMAK CEBECİ
- Mikroskobik kanallar üzerinde gerçekleşen ıslanma dinamikleri
Wetting dynamics on microscopic channels
ÖZLEM ÖZTÜRK
Doktora
Türkçe
2020
Fizik ve Fizik Mühendisliğiİstanbul Teknik ÜniversitesiFizik Mühendisliği Ana Bilim Dalı
DOÇ. DR. CEM ÖZGÜR SERVANTİE
- Design of micromixer for precision milled microfluidic systems
Hassas frezeleme mikroakıskanlar sıvı sistemleri için mikro karıştırıcı tasarımı
ALİ ALFAKHERI
Yüksek Lisans
İngilizce
2015
Makine MühendisliğiÇankaya ÜniversitesiMakine Mühendisliği Ana Bilim Dalı
Assist. Prof. Dr. ENDER YILDIRIM