scholarly journals Characterization of AL2O3 Nano Particles in Engine Oil for Enhancing the Heat transfer rate

2018 ◽  
Vol 7 (2.32) ◽  
pp. 237
Author(s):  
Ch Sridhar Yesaswi ◽  
K Ajay Krishna ◽  
A Pavan Gopal Varma ◽  
K Girish ◽  
K Jagadeesh Varma
Keyword(s):  
Heat Transfer ◽  
Structural Characteristics ◽  
Thermal Characteristics ◽  
Internal Heat ◽  
Vital Role ◽  
Nano Particles ◽  
Engine Oil ◽  
Al2o3 Nanoparticles ◽  
Engine Oils ◽  
Nano Fluids

Selection of suitable engine oils becoming more challenging for automobile engineers. Life of the engine majorly depends upon engine oil, type of fuel being used and various other thermal and structural characteristics of the engine. Dissipation of heat is one of the major consideration in the design of automobile engines. Generally engine oils are used for the lubrication between piston and cylinder but to enhance the cooling effectiveness Nano-particles are added in the lubricant, so that internal heat generation in the engines can be minimized. Nano-fluids are playing a vital role in heat transfer applications because of its enhanced thermal conductivity nature and generally these fluids are colloidal mixture of Nano particles and base fluids. Intense research studies over Nano fluids are very high because of their sublime behavior.Recently. Advanced research over Nano technology has gone to a situation where two or more Nano particles are made to mix in a base fluids and generally we call this as hybrid Nano fluids. In this work, preparation of Al2O3 nanoparticles and mixing them with 10W30 engine oil were carried out. By various techniques thermal characteristics of fluid are identified with different parameters.  

scholarly journals Structural And Thermal Characteristics of Aluminum Grades 6063 and 7075 with Application of Nano Coatings

2018 ◽  
Vol 7 (2.32) ◽  
pp. 187
Author(s):  
Ch Sridhar Yesaswi ◽  
N Venkata Sai ◽  
K Vivek ◽  
B Raju ◽  
G Venkat
Keyword(s):  
Heat Exchangers ◽  
Power Plants ◽  
Material Selection ◽  
Structural Characteristics ◽  
Thermal Characteristics ◽  
Vital Role ◽  
Nano Particles ◽  
Technology Advancement ◽  
Nano Coating ◽  
Metal Pipes

To fabricate any product, material selection is one of the major constraints for many engineers even on today. An intensive research is being done by scientists and engineers over the properties and characteristics of the materials. Due to the technology advancement, applications of various new products are entering into market with different materials. From the past few decades composites and alloy materials are playing a vital role because of their unique nature. In the present work heat exchangers are taken into application. In nuclear and power plants heat exchangers plays a crucial role in cooling the reactors. When these are made to cool with water by sending through metal pipes over a period of time, metal pipes get easily corroded because of water and thermal conductivity of the metal. When base metals are coated with Nano-particles there is a drastic change in their behavior. In this paper Aluminum grade 6063 and grade 7075 are considered and coated with Al2O3-NaOH Nano fluids. Their thermal and structural characteristics are identified before and after Nano coating.    

Effect of Nanoparticle and Inclination Angle at Thermal Efficiency in Heatpipes

2021 ◽  
pp. 1271-1288
Author(s):  
Sina Razvarz ◽  
Raheleh Jafari ◽  
Cristóbal Vargas Jarillo ◽  
Alexander Gegov
Keyword(s):  
Heat Pipe ◽  
Inclination Angle ◽  
Thermal Efficiency ◽  
Pure Water ◽  
Thermal Characteristics ◽  
Nano Particles ◽  
Al2o3 Nanoparticles ◽  
Al2o3 Nanoparticle ◽  
Nano Fluids

This chapter demonstrated an experimental study about the effect of inclination angle and nano particles in active fluids and curves related to thermosiphons and heatpipes. In this context, the chapter gives a brief overview of the effect of nano fluids on thermal conductivity and thermal efficiency enhancement of a heat pipe on the different operating state and next idea is studying of efficacy related to the inclination angle of the heat pipe. In this book chapter, there is an experimental investigation employing Al2O3 nanoparticle in order to study the enhancement of thermal characteristics of a heat tube in different inclination angle. Three cases, for Al2O3 nanoparticles in water with volume concentrations 1%, 2%, and 3% are considered and results are compared with the thermal performance of the heat pipe filled with pure water. The result of each case will present in the different angular of pipeline and clearly will show the effect of the gravity in the pipeline.

scholarly journals Performance Improvement of Base Fluid Heat Transfer Medium Using Nano Fluid Particles

2020 ◽  
Vol 23 (4) ◽  
pp. 235-243
Author(s):  
T. Sathish
Keyword(s):  
Heat Transfer ◽  
Performance Improvement ◽  
Base Fluid ◽  
Flow Problem ◽  
Thermal Characteristics ◽  
Nano Particles ◽  
Simulation Tool ◽  
Heat Transfer Medium ◽  
Nano Fluid ◽  
Nano Fluids

Base fluids like water, ethylene glycolandengineoilare conventionally used as a heat transfer medium. The performance of heat transferred is improved in the conventional fluids with the addition of Nano particles. Hence, this paper considers the forced conventional flow problem over the base fluid within a uniform heated tube placed on a wall. The analysis of heattransferco-efficientis done through a constant Reynoldsnumberfor both Nano and base fluid with a simulation tool. Further, a comparative analysis is carried out with heat transfer coefficient over the base and various Nano fluids. It is seen that the Nano fluids has a better performance due to its better thermal characteristics under standard conditions.

Heat Transfer Properties of Engine Oils

2005 ◽  
Author(s):  
Scott Wrenick ◽  
Paul Sutor ◽  
Harold Pangilinan ◽  
Ernest E. Schwarz
Keyword(s):  
Heat Transfer ◽  
Thermal Conductivity ◽  
Diesel Engine ◽  
Specific Heat ◽  
Mineral Oil ◽  
Engine Oil ◽  
Group V ◽  
Engine Oils ◽  
Heat Transfer Fluids ◽  
Transfer Properties

The thermal properties of engine oil are important traits affecting the ability of the oil to transfer heat from the engine. The larger the thermal conductivity and specific heat, the more efficiently the oil will transfer heat. In this work, we measured the thermal conductivity and specific heat of a conventional mineral oil-based diesel engine lubricant and a Group V-based LHR diesel engine lubricant as a function of temperature. We also measured the specific heat of ethylene glycol. The measured values are compared with manufacturers’ data for typical heat transfer fluids. The Group V-based engine oil had a higher thermal conductivity and slightly lower specific heat than the mineral oil-based engine oil. Both engine oils had values comparable to high-temperature heat transfer fluids.

Evaluation of Nusselt number and pressure drop in hexagonal and rectangular micro-channels in the presence of nano-fluids

2020 ◽  
Vol 234 (6) ◽  
pp. 665-672
Author(s):  
S Emami ◽  
MH Dibaei Bonab ◽  
M Mohammadiun ◽  
H Mohammadiun ◽  
M Sadi
Keyword(s):  
Heat Transfer ◽  
Nusselt Number ◽  
Pressure Drop ◽  
Cross Section ◽  
Rectangular Cross Section ◽  
Heat Sinks ◽  
Nano Particles ◽  
Geometrical Parameters ◽  
Micro Channels ◽  
Nano Fluids

Few papers investigated the effect of different nano-fluids and geometrical parameters of the micro channels on the performance of heat sinks. In this study, Nusselt number and pressure drop are investigated in differential geometry and Reynolds numbers. Then the effect of the micro-channel is studied for different heat flux. The results show that hexagonal micro-channels represents a better performance than the rectangular and the heat transfer of without using nano-particles in the hexagonal cross-section is about 9% higher than the rectangular cross-section and with the presence of nanoparticles (Al2O3 - CUO- TiO2, φ  =  4%), heat transfer is about 30 to 40% higher than the base liquid.

scholarly journals Analysis of Machining Operation using Vegetable Oil and Nano Fluids

2021 ◽  
pp. 380-386
Author(s):  
Mr. Pratap R. Sonawane ◽  
Dr. Rahul B. Barjibhe
Keyword(s):  
Heat Transfer ◽  
Titanium Oxide ◽  
Production Costs ◽  
Nano Particles ◽  
Cutting Fluid ◽  
Nano Lubricant ◽  
Feasible Alternative ◽  
Cutting Zone ◽  
Steel Turning ◽  
Nano Fluids

The influence of the hybrid additives of alumina and titanium oxide on varied lubricant characteristics as a cut fluid in steel turning. In varied volumetric concentrations, the hybrid nano lubricant has to evolve. The mixture of alumina and titanium oxide improved its tribology. The new nano-lubricant reduces the wear and nodal temperature of the tool's flank substantially. The application of hybrid nano-particles rather than nano-particles is among the most significant jobs in improving the heat transfer of fluids. We saw several sorts of pairs used to cut fluid and their effects on machining (turning).A potential MQL approach can be tested to limit the excessive use of traditional cutting fluid. The minimum amount of any cutting fluid in this approach is sprayed into the cutting zone at high pressure to improve its penetration into the machining area. Using MQL enhances surface quality and the life of the tool. MQL is a feasible alternative to wet machining. In their perspective. Therefore, both production costs and environmental dangers may be minimized through MQL..

Analysis about enhancement in thermal characteristics of viscous fluid flow with induction of ferrite particles by using Cattaneo Christov theory

2021 ◽  
pp. 095440622110426
Author(s):  
Wajiha Tahir ◽  
S Bilal ◽  
Nabeela Kousar ◽  
Imtiaz Ali Shah ◽  
Ali S Alqahtani
Keyword(s):  
Heat Transfer ◽  
Temperature Profile ◽  
Zinc Ferrite ◽  
Thermal Flux ◽  
Mathematical Formulation ◽  
Thermal Characteristics ◽  
Heat Transfer Process ◽  
Vital Role ◽  
Solid Particles ◽  
Nickel Zinc

The elevated convective heat transfer process plays vital role in performance of electronic and engineering equipment’s. Over the years various attempts have been executed in this regards, including the insertion of nano elements in poorly conducting liquids. Initially, improvement in thermophysical characteristics of ordinary fluids was observed but with advancement in nanoparticles structuring new classifications in nano elements are found. Among these discoveries experimentations have explored highly fascinating and intrinsically featured class of nanomaterials renowned as ferromagnetic nano constituents. So, the motivation regarding this investigation is execution about change in thermal features of base liquid with insertion of different ferrite particles. Here, water is considered as based liquid and Nickel Zinc Ferrite (NiZnFe2O4) and magnetite ferrite (Fe2O4) as solid particles are inserted. Impact of magnetic dipole is also envisioned to produce optimized effectiveness of ferrite particles. Energy transmission in flow domain is depicted by incorporation of Cattaneo-Christov heat flux model. Mathematical formulation containing thermo mechanical features of ferrite particles are attained in complexly structured partial differential system and afterwards similarity transformations are implemented for transmutation into ODES. Constructed problem is simulated by implementing numerical approaches. Influence of involved variables on associated distributions are displayed through graphs and tables. It is demonstrated that momentum as well as heat transfer of base fluid augments with inclusion of Nickel Zinc ferrite as compared magnetite ferrite. It is inferred that velocity shows declining behavior against Curie temperature whereas reverse behavior is seen for temperature profile. It is divulged that viscous dissipation imparts diminishing impact on momentum whereas contrary behavior is depicted in case of temperature profile. In addition, increment in wall drag magnitude and thermal flux is manipulated by incorporation of (NiZnFe2O4) rather than (Fe2O4).

Performance Evaluation of Thermal Attributes in Impinging Jet Heat Sink using Airfoil Pillars with and without Nano Fluid

2021 ◽  
Vol 7 (5) ◽  
pp. 2808-2820
Author(s):  
Deepak Kumar ◽  
Mohammad Zunaid ◽  
Samsher Gautam
Keyword(s):  
Heat Transfer ◽  
Heat Sink ◽  
Three Dimensional ◽  
Thermal Characteristics ◽  
Exchange Coefficient ◽  
Dimensional Model ◽  
Heat Exchange Coefficient ◽  
Three Dimensional Model ◽  
Nano Fluid ◽  
Nano Fluids

Objectives: In the current research three techniques have been operated to enhance the rate of heat transfer in a heat sink. The amalgamation of Impingement of jet, airfoil pillars and Nano fluids are used. Nano fluids has a lot of potential to enhance the heat transportation in contrast to the water. The investigation has been executed with the help of three dimensional numerical model using Computational fluid Dynamics. At the onset the model has been validated with the inspection carried out already in experimental form. The observations in the form of thermal attributes are investigated. From the results the conclusion is made that the use of airfoil pillars and Nano fluids has increased the thermal characteristics of the three dimensional model in the form of heat exchange coefficient by almost 28.2%. The Nano fluid has been utilized for the 0.5% concentration.

Intensification of Heat Transfer in a Double Tube Heat Exchanger with Nano-Fluids and Trapezoidal Cut Twisted Tape - A Numerical Study

2019 ◽  
Vol 11 (3) ◽  
Author(s):  
C. Gnanavel ◽  
R. Saravanan ◽  
M. Chandrasekaran
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Numerical Study ◽  
Beryllium Oxide ◽  
Nano Particles ◽  
Twisted Tape ◽  
Tube Heat Exchanger ◽  
Passive Technique ◽  
Energy Equations ◽  
Nano Fluids

The heat transfer enhancement is normally demanded in industries for heating, cooling and evaporation in the equipment’s like air conditioning, radiators and refrigerators etc. The passive, active or combination of them usually employed for intensification of heat transfer in such heat exchangers. In this study, we focus on an innovative passive technique. The dual approach is to increase the conductivity of the suspended nano-particles such as titanium dioxide, beryllium oxide or beryllia, zinc oxide and copper oxide in the water. The flow resistance is offered by inserting the twisted tape with trapezoidal cut. The objective of the numerical study is to investigate the thermal and flow fields by utilizing various types of nano-fluids with and without twisted tape in the double tube heat exchanger. The finite volume method is employed to solve the continuity, momentum and energy equations.

Thermohydrodynamic Analysis of Journal Bearing Operating Under Nanolubricants

2011 ◽  
Author(s):  
K. Prabhakaran Nair ◽  
P. K. Rajendra Kumar ◽  
K. Sreedhar Babu
Keyword(s):  
Journal Bearing ◽  
Numerical Technique ◽  
Load Capacity ◽  
Performance Characteristics ◽  
Nano Particles ◽  
Engine Oil ◽  
Al2o3 Nanoparticles ◽  
Static Performance ◽  
Energy Equations ◽  
Commercial Lubricant

The static performance characteristics of thermo hydrodynamic journal bearing operating under lubricant Veedol SAE 15W 40 multi grade engine oil with CuO, CeO2 and Al2O3 nanoparticles are presented. These static performance characteristics mainly depend on the viscosity of the lubricant. The addition of nano particles on commercially available lubricant may enhance the viscosity of lubricant and in turn changes the performance characteristics. In the proposed work CuO, CeO2 and Al2O3 nano particles are used with commercial lubricant Veedol SAE 15W 40 multi grade engine oil. To obtain pressure and temperature distribution, modified Reynolds and energy equations are used and these equations are solved by using the powerful numerical technique, Finite Element Method. An iterative procedure is used to establish the film extent. The static performance characteristics in terms of load capacity, attitude angle, end leakage and friction force are evaluated when the bearing operates under nanolubricants for the following cases. 1. Isoviscous; 2. Thermoviscous.

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