Computational Analysis of Heat Transfer Enhancement in a Circular Tubed Heat Exchanger Using Al2O3 Nanofluids | Chapter 7| Engineering Research: Perspectives on Recent Advances Vol. 6

arious heat enhancement techniques are available to find the performance of industrial and practical appliances for a more efficient heat transfer rate. One such method is the use of nanofluids, which has emerged as a passive heat transfer technique in numerous applications. Nanofluids are recognized for their significant potential to enhance heat transfer and are particularly well-suited for use in heat transfer processes. In recent years, extensive research has been conducted to better understand the mechanisms behind heat transfer enhancement and control when utilizing nanofluids. The objective of this work is to study the effect of transfer rate in an annular pipe for water and aluminum oxide nanofluid with 0.25% and 0.5 % by volume for Reynolds numbers 2000 and 3000. A numerical method finite volume was used to observe velocity and temperature. Heat transfer coefficient, Nusselt number and overall heat transfer have been calculated from simulation. The design of the annular tube was done in ANSYS workbench; in which the inner tube was assigned with aluminium and outer tube with copper. It is observed that there is an increased rate of heat transfer when nanofluid of Al₂O₃ with 0.25% compared to 0.5%.

 

Author (s) Details

 

Ch. Indira Priyadarsini
Mechanical Department, Chaitanya Bharathi Institute of Technology, Hyderabad, India.

 

P. Anjani Devi
Mechanical Department, Chaitanya Bharathi Institute of Technology, Hyderabad, India.

 

V V R Seshagiri Rao
Mechanical Department, Chaitanya Bharathi Institute of Technology, Hyderabad, India.

 

 

Please see the book here:- https://doi.org/10.9734/bpi/erpra/v6/5062

The Optimization of Boundary Layer Flow and the Role of Nanoparticles’ Radius in Thermal Performance | Chapter 9 | Fundamental Research and Application of Physical Science Vol. 7

 The hearing on magnetohydrodynamic micropolar tangent embellished waterbased Al2O3 nanofluid flow over a stretching surface with the impact of heat that radiates, heat source, and convective edge condition is discussed. This study combed the significance of growing size of nanoparticles and its impact on account of the concentration and hotness gradients in the dynamics of nanofluids endanger magnetic field. Proper converts yield highly nonlinear differential methods, which are resolved by using the bvp4c method. The velocity sketches, temperature distribution, calculating-rotation, and the skin resistance factor in addition to the heat transfer rate have presented under the effect of differing physical parameters. It is noticed that the variation in the speed and temperature descriptions occurred on account of the increasing size of nanoparticle and the impact of complicated parameters. Furthermore, it causes an increase in heat transfer rate, while the warm boundary coating becomes thicker accompanying intensifying Biot number. The impact of influential parameters on tangible quantities is illustrated through graphs.

Author(s) Details:

Liaqat Ali,
School of Sciences, Xi’an Technological University, Xi’an, 710021, China.

Please see the link here: https://stm.bookpi.org/FRAPS-V7/article/view/11126

Study on the Effect of Nozzle Angle and Air Flow Rate during Nanofluid Minimum Quantity Lubrication Milling of Aerospace Alloy Al7075-T6 | Chapter 01 | Novel Perspectives of Engineering Research Vol. 10

 Industry nowadays is concentrating on developing various strategies and approaches for implementing sustainable manufacturing, which is a "need of the hour." With the advent of global competitiveness, industries are focusing their efforts on lowering machining costs, which account for a significant portion of a company's production cost per part.' The traditional method of cooling the machining zone by using a lot of coolant/cutting fluids at a rate of several litres per hour has a lot of people worried. Due to rigorous government requirements, industries must replace flood-coolant assisted machining with new techniques such as the 'Minimum Quantity Lubrication' (MQL) coolant delivery methodology. The goal of this investigation was to see if a novel approach called Minimum Quantity Lubrication cooling could be used to replace traditional flood cooling. The goal of this study was to see how changing the nozzle orientation angle and airflow rate affected MQL milling of aerospace aluminium Al7075-T6 alloy with an uncoated carbide tool. The three ways of coolant delivery that have been examined are dry, MQL, and nanofluid MQL (nanoparticle suspended oil with MQL). Cutting speed [150 m/min, 208 m/min, 264 m/min], feed rate [95 mm/min, 110 mm/min, 125 mm/min], and cut depth [0.5 mm, 1.3 mm, 2 mm] are employed as process variables. Two nozzle angles of 25° and 50° were evaluated with 1.5 kg/cm2 and 3 kg/cm2 air flow rates. At a 1.5 kg/cm2 air flow rate, the best results were obtained. 250 degrees was discovered to be the optimal nozzle angle. The use of nanofluid MQL machining to achieve the lowest temperature and generate the least amount of heat is a viable option. Nanofluid MQL technology is employed in the MQL technique to achieve a better surface finish with reduced workpiece surface roughness (Al7075-T6).

Author(S) Details

Harshit B. Kulkarni
Department of Mechanical Engineering, KLS Gogte Institute of Technology, Udyambag, Belagavi, Karnataka, India.

View Book:- https://stm.bookpi.org/NPER-V10/article/view/6497 

Study on Radiative MHD Nanofluid Flow over a Vertically Stretching Sheet in the Presence of Buoyancy Forces with Viscous Dissipation | Chapter 4 | Newest Updates in Physical Science Research Vol. 10

 The purpose of this research is to look at the flow and heat transfer properties of magneto hydrodynamic nanofluid flow over a permeable vertical stretching sheet in the presence of radiation, buoyancy, and viscous dissipation. A similarity transformation was used to convert the governing partial differential equations into a set of non linear ordinary differential equations. The Keller Box Method, an implicit finite difference scheme, is then utilised to numerically solve the issues. A comparison is made between the obtained Keller Box solutions and previously published work. For the purpose of On velocity, temperature, and nano particle volume fraction profile distribution, numerical results for different values of Magnetic field parameter, suction parameter, Prandtl number, buoyancy parameter, Schmidt number, Biot number, radiation parameter, Eckert number, Brownian motion, and Thermophoresis parameter have been shown graphically.

Author(s) Details

Dr. D. Hymavathi
Department of Mathematics, Mahatma Gandhi University, Nalgonda, Telangana State, India and Department of Mathematics, Osmania University, Hyderabad, Telangana State, India.

Kishan Naikoti
Department of Mathematics, Osmania University, Hyderabad, Telangana State, India.

View Book :- https://stm.bookpi.org/NUPSR-V10/article/view/2377

An Illustrative Experimental Investigation of a Nanofluid (Al2O3+H2O) Based Parabolic trough Solar Collectors | Chapter 7 | Recent Advances in Science and Technology Research Vol.4

 

In the present work the effect of working fluid (Al2O3 + water nanofluid) on the efficiency of a parabolic

trough solar collector was investigated experimentally. The weight fraction of nano particles was 0.1%

and the particles dimension was 40 nm. Experiments were performed with and without nanofluid. The

mass flow rate of nanofluid is constant at 2 Lit/min. The results shows that, nanofluid based parabolic

trough collector has higher efficiency than water based parabolic trough collector. For 0.1%, the

increased solar thermal efficiency was nearly 7%. From the results, it can be concluded that the

nanofluid causes an enhancement in heat transfer coefficient by 32%. The paper presents the

preparation of nanofluid, calculation of nanofluids properties, test result and performance evaluation of

Parabolic Trough Solar Collectors with and without nanofluids.

Author (s) Details

K. S. Chaudhari

Department of Mechanical Engineering, G H Raisoni College of Engineering, Nagpur, India.

P. V. Walke

Department of Mechanical Engineering, G H Raisoni College of Engineering, Nagpur, India.

U. S. Wankhede

Department of Mechanical Engineering, G H Raisoni College of Engineering, Nagpur, India.

R. S. Shelke

Department of Mechanical Engineering, G H Raisoni College of Engineering, Nagpur, India.

View Book :-https://bp.bookpi.org/index.php/bpi/catalog/book/240