Experimental Investigation of Influence of SiO2 Nanoparticles on the Tribological and Rheological properties of SAE 40 Lubricating Oil

AbstractThe most important property of cements and concretes after strength is the workability, which is controlled by the rheological characteristics of the mix. Theoretical modeling having proved complicated and in some cases mathematically untractable, cement specialists have concentrated on empirical based models for the last two decades. The major theoretical contributions to date on the properties of colloidal and concentrated suspensions are summarized and a general framework for theoretical modeling of cement viscosity is established. The empirical modeling and the experimental investigation of the rheological properties of fresh cements are reviewed and discussed. A semi-empirical model is proposed and its validity tested in the interpretation of some published experimental results.

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Stability and rheological properties of nanofluids stabilized by SiO2 nanoparticles and SiO2-TiO2 nanocomposites for oilfield applications

Colloids and Surfaces A Physicochemical and Engineering Aspects ◽

10.1016/j.colsurfa.2017.12.028 ◽

2018 ◽

Vol 539 ◽

pp. 171-183 ◽

Cited By ~ 41

Author(s):

Ravi Shankar Kumar ◽

Tushar Sharma

Keyword(s):

Rheological Properties ◽

Sio2 Nanoparticles

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Consolidated states of dilation in granular material: Experimental investigation and comparison of rheological properties

Advanced Powder Technology ◽

10.1016/j.apt.2015.03.003 ◽

2015 ◽

Vol 26 (3) ◽

pp. 887-893 ◽

Cited By ~ 1

Author(s):

Kalyana C. Pingali

Keyword(s):

Experimental Investigation ◽

Granular Material ◽

Rheological Properties

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Experimental Investigation of the Effect of Exhaust Gas Recirculation on Lubricating Oil Degradation and Wear of a Compression Ignition Engine

Journal of Engineering for Gas Turbines and Power ◽

10.1115/1.2136368 ◽

2005 ◽

Vol 128 (4) ◽

pp. 921-927 ◽

Cited By ~ 15

Author(s):

Shrawan Kumar Singh ◽

Avinash Kumar Agarwal ◽

Dhananjay Kumar Srivastava ◽

Mukesh Sharma

Keyword(s):

Experimental Investigation ◽

Direct Injection ◽

Exhaust Gas Recirculation ◽

Lubricating Oil ◽

Exhaust Gas ◽

Scanning Electron Micrographs ◽

Compression Ignition ◽

Piston Rings ◽

Compression Ignition Engine ◽

Gas Recirculation

This experimental investigation was aimed to investigate the effect of exhaust gas recirculation (EGR) on wear of in-cylinder engine parts. EGR setup was prepared for a two-cylinder, air-cooled, constant-speed direct-injection compression-ignition engine. Test setup was run for 96hr under predetermined loading cycles in two phases; normally, operating condition (i.e., without EGR) and with a fixed EGR rate of 25%. Addition of metallic wear debris in the lubricating oil samples drawn after regular interval from both engine operating phases was investigated. Relatively higher concentrations of all wear metals were found in the lubricating oil of the EGR-operated engine, which indicates higher wear of various engine parts. Weight loss of piston rings used in both phases was compared to quantify the amount of wear of piston rings. To quantify the amount of cylinder wear surface roughness parameters of cylinder liners were measured at three positions (top dead center, mid-stroke, and bottom dead center) on thrust and anti-thrust side. A qualitative analysis was also carried out by taking surface profiles and Scanning Electron Micrographs at same locations.

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