Investigation on Magneto Eyring-Powell nanofluid flow over inclined stretching cylinder with nolinear thermal radiation and Joule heating effect

2019 ◽  
Vol 16 (1) ◽  
pp. 51-63 ◽  
Author(s):  
S.S. Ghadikolaei ◽  
Kh. Hosseinzadeh ◽  
D.D. Ganji
Keyword(s):  
Thermal Radiation ◽  
Chemical Reaction ◽  
Joule Heating ◽  
Flow Profile ◽  
Heating Effect ◽  
Reaction Heat ◽  
Radiation Chemical ◽  
Content Type ◽  
Buongiorno’S Model ◽  
Joule Heating Effect

Purpose The purpose of this study is, mixed convection on magnetohydrodynamic (MHD) flow of Eyring–Powell nanofluid over a stretching cylindrical surface in the presence of thermal radiation, chemical reaction, heat generation and Joule heating effect is investigated and analyzed. The Brownian motion and thermophoresis phenomenon are used to model nanoparticles (Buongiorno’s model). Design/methodology/approach The numerical method is applied to solve the governing equations. Obtained results from the effects of different parameters changes on velocity, temperature and concentration profiles are reported as diagrams. Findings As a result, velocity profile has been reduced by increasing the Hartman number (magnetic field parameter) because of the existence of Lorentz force and increasing Eyring–Powell fluid parameter. In addition, the nanoparticle concentration profile has been reduced because of increase in chemical reaction parameter. At the end, the effects of different parameters on skin friction coefficient and local Nusselt number are investigated. Originality/value Eyring–Powell nanofluid and MHD have significant influence on flow profile.

scholarly journals Flow control in microfluidics devices: electro-osmotic Couette flow with joule heating effect

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
C. Ahamed Saleel ◽  
Saad Ayed Alshahrani ◽  
Asif Afzal ◽  
Maughal Ahmed Ali Baig ◽  
Sarfaraz Kamangar ◽  
...  
Keyword(s):  
Flow Control ◽  
Couette Flow ◽  
Joule Heating ◽  
Dynamic Viscosity ◽  
Microfluidic Devices ◽  
Heating Effect ◽  
Content Type ◽  
Osmotic Flow ◽  
Joule Heating Effect ◽  
Electro Osmotic Flow

PurposeJoule heating effect is a pervasive phenomenon in electro-osmotic flow because of the applied electric field and fluid electrical resistivity across the microchannels. Its effect in electro-osmotic flow field is an important mechanism to control the flow inside the microchannels and it includes numerous applications.Design/methodology/approachThis research article details the numerical investigation on alterations in the profile of stream wise velocity of simple Couette-electroosmotic flow and pressure driven electro-osmotic Couette flow by the dynamic viscosity variations happened due to the Joule heating effect throughout the dielectric fluid usually observed in various microfluidic devices.FindingsThe advantages of the Joule heating effect are not only to control the velocity in microchannels but also to act as an active method to enhance the mixing efficiency. The results of numerical investigations reveal that the thermal field due to Joule heating effect causes considerable variation of dynamic viscosity across the microchannel to initiate a shear flow when EDL (Electrical Double Layer) thickness is increased and is being varied across the channel.Originality/valueThis research work suggest how joule heating can be used as en effective mechanism for flow control in microfluidic devices.

Finite element analysis of vertical micro-probe considering Joule-heating effect

2017 ◽  
Vol 101 ◽  
pp. 96-105 ◽  
Author(s):  
Hyun-Woo Jung ◽  
Seung-Jae Kim ◽  
Yun-Jae Kim ◽  
Jung-Yup Kim ◽  
Joo-Yul Lee ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Joule Heating ◽  
Heating Effect ◽  
Element Analysis ◽  
Joule Heating Effect

JOULE HEATING EFFECT REDUCTION OF AN ELECTROMAGNET SYSTEM UTILIZING ON-CHIP MAGNETIC CORE

2016 ◽  
Vol 78 (8-4) ◽  
Author(s):  
Ummikalsom Abidin ◽  
Jumril Yunas ◽  
Burhanuddin Yeop Majlis
Keyword(s):  
Joule Heating ◽  
Temperature Rise ◽  
Magnetic Core ◽  
Operating Conditions ◽  
Optimum Operating ◽  
Pdms Layer ◽  
Heating Effect ◽  
Joule Heating Effect ◽  
Magnet Wire ◽  
On Chip

Joule heating effect is substantial in an electromagnet system due to high density current from current-carrying conductor for high magnetic field generation. In Lab-on-chip (LoC) Magnetically Activated Cell Sorting (MACS) device, Joule heating effect generating high temperature and affecting the biological cells viability is investigated. The temperature rise of the integrated system was measured using resistance temperature detector, RTD Pt100. Three temperature rise conditions which are from the bare spiral-shaped magnet wire, the combination of magnet wire and on-chip magnetic core and combination of magnet wire, on-chip magnetic core and 150 mm polydimethylsiloxane (PDMS) layer have been investigated.  The combination of electromagnet of spiral-shaped magnet wire coil and on-chip magnetic core has reduced the temperature significantly which are, ~ 38 %  and ~ 26 % with magnet wire winding, N = 10 (IDC = 3.0 A, t = 210 s) and N = 20 (IDC = 2.5 A, t = 210 s) respectively. The reduced Joule heating effect is expected due to silicon chip of high thermal conductivity material enable fast heat dissipation to the surrounding.  Therefore, the integration of electromagnet system and on-chip magnetic core has the potential to be used as part of LoC MACS system provided the optimum operating conditions are determined

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