Impact of nano-particles shapes on Al2O3-water nano-fluid flow due to a stretching cylinder

Purpose The purpose of this study is to theoretically probe the shape impacts of nano-particle on boundary layer flow of nano-fluid toward a stretching cylinder with heat-transmission effects. The base fluid used for this study is pure water, and aluminum oxide nano-particles are suspended in it. Four different shapes of nano-particle, namely, cylindrical, brick, platelets and blades, are considered to carry out the study. Design/methodology/approach The problem is modelled mathematically and the nonlinear system of equations is attained by using appropriate transmutations. The solution of transmuted equations is achieved by utilizing a shooting technique with Fourth-Fifth order Runge–Kutta Fehlberg scheme. Numerically attained results are elucidated through graphs and tables which are further compared under limiting cases with existing literature to check the validity of the results. Findings It is observed that fluid velocity and temperature of cylindrical shaped water nano-fluids are more than the nano-fluid having brick-shaped nano-particles. Moreover, it is seen that the nano-fluids suspended with platelets-shaped nano-particles have higher velocity and temperature than the nano-fluids containing blade-shaped nano-particles. The curvature parameter and nano-particles volume fraction have increasing effects on flow velocity and temperature of nano-fluids containing all types of nano-particle shapes. Originality/value Numerous authors have examined the impacts of nano-particle shapes on characteristics of heat transfer and fluid flow. However, to the best of the authors’ knowledge, the shape impacts of nano-particles on boundary layer flow of nano-fluid toward a stretching cylinder with heat-transmission effects have not been discussed. So, to fulfill this gap, the present paper explicates the impacts of various nano-particle shapes on Al2O3–water-based nano-fluid flow past a stretching cylinder with heat-transfer effects.

Download Full-text

Numerical study of unsteady boundary layer flow and heat transmission of a nano-fluid past a continuously stretching sheet immersed in porous media

International Journal of Numerical Methods for Heat &amp Fluid Flow ◽

10.1108/hff-11-2018-0664 ◽

2019 ◽

Vol 30 (4) ◽

pp. 1589-1602

Author(s):

Sajjad Haider ◽

Imran Syed Muhammad ◽

Yun-Zhang Li ◽

Adnan Saeed Butt

Keyword(s):

Boundary Layer ◽

Porous Medium ◽

Porous Media ◽

Finite Difference ◽

Difference Scheme ◽

Heat Transmission ◽

Unsteady Boundary Layer ◽

Content Type ◽

Nano Fluid ◽

Layer Flow

Purpose This paper aims to incorporate a numerical investigation of unsteady flow of nano-fluid near the boundary wall and heat transmission over a flat sheet in porous media under the assumption that sheet is continuously stretching. A comprehensive study is accomplished to probe the impacts of different physical parameters on heat transmission and fluid flow. Design/methodology/approach The problem is designed mathematically by using Navier–Stokes equations and corresponding equations are transmuted into non-dimensional form, which are reduced to local non-similarity equations. Implicit finite difference scheme is used to attain a non-similar solution for values of similarity variable ranging in [0,1] Findings The reduced Nusselt number is a decreasing function of each dimensionless number, while the reduced Sherwood number is an increasing function of each considered value of parameters Pr, Sc, Nb and Nt. Originality value Motivated by the industrial, technological and scientific importance, the objective of this study is to discuss the unsteady flow generated by linear stretching of the surface in Nano-fluid in a porous medium. However, the investigation of unsteady boundary layer flow and heat transfer of a Nano-fluid past a stretching surface immersed in a porous medium has not been discussed yet. Furthermore, finite difference scheme is used to solve the problem, and authenticate results are achieved which are in good agreement with published work.

Download Full-text

Effect of Titanium Dioxide (Tio2) Nano-Fluid on Performance and Emission Features of a Diesel Engine Operated on Aphanizomenon Flos Biodiesel-Diesel Blend

Materials Science Forum ◽

10.4028/www.scientific.net/msf.969.421 ◽

2019 ◽

Vol 969 ◽

pp. 421-426

Author(s):

G. Jayabalaji ◽

P. Shanmughasundaram

Keyword(s):

Titanium Dioxide ◽

Diesel Engine ◽

Nano Particles ◽

Nano Particle ◽

No Emission ◽

Single Cylinder ◽

Performance And Emission ◽

Nano Fluid ◽

Ci Engine

In this present investigation titanium dioxide (TiO2) nano-fluid was blended with aphanizomenon flos (AF) biodiesel (20%)-diesel (80%) blend. Different percentages of TiO2 such as 5%, 10%, and 15%, was added with AF-D (aphanizomenon flos-diesel) blends. The blends are named as AFD-5TiO2, AFD-10TiO2, and AFD-15TiO2. The performance and emission parameters of a single cylinder CI engine fueled with AFD-TiO2 blends were experimentally investigated. The results reveal that, with the use of TiO2 nano particles, AFD-10TiO2 blend gave optimum results. BSFC decreased by about 5% and BTE increased by about 2% with the addition of TiO2 nano-particle as a catalyst. The tailpipe emissions such as CO, HC, smoke reduced drastically, but the NO emission increased, with the use of TiO2 nano-particles.

Download Full-text

Study on Chemical Reactivity Control of Liquid Sodium: Development of Nano-Fluid and Its Property and Applicability to FBR Plant

Volume 1: Plant Operations, Maintenance, Installations and Life Cycle; Component Reliability and Materials Issues; Advanced Applications of Nuclear Technology; Codes, Standards, Licensing and Regulatory Issues ◽

10.1115/icone16-48367 ◽

2008 ◽

Author(s):

Jun-Ichi Saito ◽

Kuniaki Ara ◽

Ken-Ichiro Sugiyama ◽

Hiroshi Kitagawa ◽

Haruyuki Nakano ◽

...

Keyword(s):

Chemical Reactivity ◽

Nano Particles ◽

Liquid Sodium ◽

Atomic Interaction ◽

Nano Particle ◽

Fast Breeder Reactor ◽

Weak Point ◽

High Chemical ◽

Nano Fluid ◽

High Chemical Reactivity

Liquid sodium is used as the coolant of the fast breeder reactor (FBR). A weak point of sodium is a high chemical reactivity with water or oxygen. So an idea of chemical reactivity suppression of liquid sodium itself is proposed. The idea is that nano-meter size particles (hereafter called nano-particles) are dispersed in liquid sodium, and an atomic interaction which is generated between nano-particle and sodium atoms is applied to suppress the chemical reactivity. We call sodium that has dispersed the nano-particle a Nano-fluid. Three key technologies which are the trial manufacture of Nano-fluid, the reaction property of the Nano-fluid and applicability of Nano-fluid to FBR Plant have been carried out to develop the Nano-fluid.

Download Full-text

The study of MHD Nano fluid flow with chemical reaction along with thermophoresis and Brownian motion on boundary layer flow over a linearly stretching sheet

Science Forum (Journal of Pure and Applied Sciences) ◽

10.5455/sf.53268 ◽

2019 ◽

Vol 19 (1) ◽

pp. 83

Author(s):

Abdul Madaki ◽

D Yakubu ◽

M Adamu ◽

R Roslan

Keyword(s):

Boundary Layer ◽

Brownian Motion ◽

Fluid Flow ◽

Chemical Reaction ◽

Boundary Layer Flow ◽

Stretching Sheet ◽

And Brownian Motion ◽

Nano Fluid ◽

Layer Flow

Download Full-text

Thermophysical Properties of Hybrid Nano Fluids

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.a5240.119119 ◽

2019 ◽

Vol 9 (1) ◽

pp. 5038-5040

Keyword(s):

Thermophysical Properties ◽

Acid Treatment ◽

Nano Particles ◽

Agriculture Waste ◽

Nano Fluid ◽

Bamboo Leaves ◽

Pure Sio2 ◽

Nano Fluids

In this study, the ash from agriculture waste of bamboo leaves was used in the synthesis of silica nano particles followed by leaching and acid treatment. The required ash from agriculture waste (bamboo leaves) is subjected to sintered at 700 degree centigrade for 5 hours to eliminate residues from ash. The obtained powder was treated with 1M NaOH for leaching and then acid- treatment with 0.5 M H2SO4 to precipitate pure SiO2 nano particles powder. The synthesized silica were characterized by XRD, FTIR, SEM, PSA, ZETA POTENSIAL. And the synthesis of CuO-SiO2 hybrid nano fluid from the agriculture waste of silica.

Download Full-text

Numerical Investigation of Heat Transfer in Car Radiation System Using Improved Coolant

Journal of Advanced Research in Fluid Mechanics and Thermal Sciences ◽

10.37934/arfmts.83.1.6169 ◽

2021 ◽

Vol 83 (1) ◽

pp. 61-69

Author(s):

Qais Hussein Hassan ◽

Shaalan Ghanam Afluq ◽

Mohamed Abed Al Abas Siba

Keyword(s):

Heat Transfer ◽

Nusselt Number ◽

Numerical Analysis ◽

Fluid Dynamic ◽

Pure Water ◽

Nano Particles ◽

Nano Particle ◽

Temperature Dependent ◽

Ansys Fluent ◽

Nano Fluid

In the this study , numerical analysis of heat transfer in the radiation system of the car has been investigated by using pure water and water with nano-fluid. ANSYS fluent version 16.1 has been conducted to carry out the simulation process using Computational Fluid Dynamic (FCD) approach. This study has been validated with experimental results and based on the simulation results the error was 8% when applying the same boundary condition. And the validation process was carried out for the flow rate with Nusselt number in both concertation 0.7 % and 1 %. Based on numerical analysis, the Nusselt number has been increased by increasing nano particle concertation. Increased number of Nusselt causes the enactment of the heat exchanger. The previous experimental data show that the heat transfer of the nanofluids was based highly on the concentration of nano particles, the flux conditions and the weak temperature-dependent heat transfer conditions.

Download Full-text

Thermo-Acoustical and FTIR Spectroscopic Research of Nanofluids at Different Temperatures

International Journal of Recent Technology and Engineering - 2 ◽

10.35940/ijrte.e3207.018520 ◽

2020 ◽

Vol 8 (5) ◽

pp. 5306-5309

Keyword(s):

Thermal Conductivity ◽

Bond Formation ◽

Nano Particles ◽

Wide Spread ◽

Nano Fluid ◽

Cohesive Properties ◽

Physical Chemical ◽

Different Temperatures ◽

Chemical Studies ◽

Nano Fluids

In recent years the greater interest of increase in thermal conductivity have attracted because there is comparison to that of the base fluids by Nano fluids. The wide spread of nano particles of the formation nano fluid of a base fluid, takes place. These nano fluids are very much useful in thermo dynamical applications and in the study of so many physical-chemical studies. The properties of molecular of sound in nano fluids like transmission undergo changes of associated systems in highly dependent and the cohesive properties of liquids. Generally nano fluid is having high thermal conductivity values. Four different temperatures have been studied in this thermo-acoustical work and FTIR Spectrum of Coo Nano fluid at T (303.15, 308.15, 313.15 and 318.15) K. The observed results are explained in the nature of interactions and bond formation.

Download Full-text

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

Journal of New Materials for Electrochemical Systems ◽

10.14447/jnmes.v23i4.a03 ◽

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.

Download Full-text

Conjugate Heat Transfer in a Hexagonal Micro Channel Using Hybrid Nano Fluids

ASME 2016 14th International Conference on Nanochannels, Microchannels, and Minichannels ◽

10.1115/icnmm2016-7961 ◽

2016 ◽

Cited By ~ 2

Author(s):

Shreyas S. Hegde ◽

Narendran Ganesan ◽

N. Gnanasekaran

Keyword(s):

Heat Transfer ◽

Surface Roughness ◽

Heat Transfer Coefficient ◽

Pressure Drop ◽

Conjugate Heat Transfer ◽

Nano Particles ◽

Micro Channel ◽

Nano Fluid ◽

Nano Fluids ◽

Effect Of Surface

Research is being focused on the use of micro channels with nano fluids as the heat sinks. This requires fundamental understanding of the heat transfer phenomenon in micro channels. The objective of this paper is to present results from a numerical study on laminar forced convection in a Hexagonal Micro Channel (HMC) heat sink. In particular, the numerical study is carried out using a single phase model. The fluid considered is Alumina-Copper hybrid Nano fluid. The performance of Al2O3+Cu+water is compared with Al2O3+water nano fluid and pure water with different volume fractions. The solid region of the channel is assumed as aluminum with a hydraulic diameter of 175μm. The solid and fluid regions of the micro channel are discretized using finite volume method by combining Navier Stokes equation and energy equation for conjugate heat transfer. The thermo physical properties for alumina nanoparticles are calculated by considering it as a spherical particle of 45nm diameter. The effect of surface roughness on convective heat transfer coefficient and pressure drop for the case of nano fluids is also considered. The analysis is further extended by adding pulsating input and by varying the velocity sinusoidally. The Brownian motion of nano particles is increased to study the efficiency of the heat sink. This ensures all the nano particles are in suspension and the randomness increases the micro convection in the fluid. Incorporating the pulsating flow increases the dispersion of the heat in the nano fluid at a faster rate and also decreases particle settlement in laminar flow. The combined effect of surface roughness and pulsating flow accounts for the change in the velocity profile and thermal boundary layer of the channel. Also the effect of surface roughness ranging from 0.2–0.6 is attempted and the variations in pressure drop, Nusselt number, and heat transfer coefficient are studied. The influence of hexagonal geometry and its interaction with alumina nano fluids is intensively studied by evaluating a three dimensional conjugate heat transfer model. The effect of side wall angle of 45°, 50° and 55° are computed to relate the velocity function with pressure drop, surface roughness and local heat transfer coefficient. The variation of Nusselt number with very low volume fraction of nano particles with a minimal amount of pressure drop is also presented.

Download Full-text