Characteristics of Darcy–Forchheimer drag coefficients and velocity slip on the flow of micropolar nanofluid

Heat Transfer ◽  
2021 ◽  
Author(s):  
Priya Mathur ◽  
S. R. Mishra ◽  
P. K. Pattnaik ◽  
R. K. Dash
Keyword(s):  
Velocity Slip ◽  
Drag Coefficients ◽  
Micropolar Nanofluid

Unsteady forced bioconvection slip flow of a micropolar nanofluid from a stretching/shrinking sheet

2016 ◽  
Vol 230 (4) ◽  
pp. 177-187 ◽  
Author(s):  
Nur Amalina Abdul Latiff ◽  
Md Jashim Uddin ◽  
O Anwar Bég ◽  
Ahmad Izani Ismail
Keyword(s):  
Skin Friction ◽  
Microbial Fuel Cells ◽  
Transfer Rate ◽  
Volume Fraction ◽  
Slip Flow ◽  
Velocity Slip ◽  
Shrinking Sheet ◽  
Local Skin ◽  
Linear Ordinary Differential Equations ◽  
Micropolar Nanofluid

The unsteady forced bioconvection boundary layer flow of a viscous incompressible micropolar nanofluid containing microorganisms over a stretching/shrinking sheet is studied numerically. A mathematical model, with the aid of appropriate transformations, is presented. The transformed non-linear ordinary differential equations are solved numerically by the Runge–Kutta–Fehlberg fourth- to fifth-order numerical method. The effect of the governing parameters on the dimensionless velocity, micro-rotation, temperature, nanoparticle volume fraction and microorganism as well as the local skin friction coefficient, the heat transfer rate and microorganisms transfer rate is thoroughly examined. The findings show that the value of skin friction and Nusselt number are decreased and microorganism number is increased as velocity slip, thermal slip and microorganism slip parameter are increased, respectively. Results from this investigation were compared with previous investigations demonstrating very good correlation. The present results are relevant to improving the performance of microbial fuel cells deploying nanofluids.

scholarly journals Dual Solutions and Stability Analysis of Micropolar Nanofluid Flow with Slip Effect on Stretching/Shrinking Surfaces

Energies ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 4529 ◽  
Author(s):  
Sumera Dero ◽  
Azizah Mohd Rohni ◽  
Azizan Saaban ◽  
Ilyas Khan ◽  
Asiful H. Seikh ◽  
...  
Keyword(s):  
Stability Analysis ◽  
Angular Velocity ◽  
Thermal Radiation ◽  
Velocity Slip ◽  
Dual Solutions ◽  
Nanofluid Flow ◽  
Linear Ordinary Differential Equations ◽  
Stretching Surfaces ◽  
Slip Effects ◽  
Micropolar Nanofluid

The purpose of the present paper is to investigate the micropolar nanofluid flow on permeable stretching and shrinking surfaces with the velocity, thermal and concentration slip effects. Furthermore, the thermal radiation effect has also been considered. Boundary layer momentum, angular velocity, heat and mass transfer equations are converted to non-linear ordinary differential equations (ODEs). Then, the obtained ODEs are solved by applying the shooting method and in the results, the dual solutions are obtained in the certain ranges of pertinent parameters in both cases of shrinking and stretching surfaces. Due to the presence of the dual solutions, stability analysis is done and it was found that the first solution is stable and physically feasible. The results are also compared with previously published literature and found to be in excellent agreement. Moreover, the obtained results reveal the angular velocity increases in the first solution when the value of micropolar parameter increases. The velocity of nanofluid flow decreases in the first solution as the velocity slip parameter increases, whereas the temperature profiles increase in both solutions when thermal radiation, Brownian motion and the thermophoresis parameters are increased. Concentration profile increases by increasing N t and decreases by increasing N b .

Thermal transport of bio-convection flow of micropolar nanofluid with motile microorganisms and velocity slip effects

2020 ◽  
Vol 96 (1) ◽  
pp. 015220
Author(s):  
M S Alqarni ◽  
Hassan Waqas ◽  
Muhammad Imran ◽  
Metib Alghamdi ◽  
Taseer Muhammad
Keyword(s):  
Thermal Transport ◽  
Velocity Slip ◽  
Convection Flow ◽  
Slip Effects ◽  
Micropolar Nanofluid

scholarly journals Chemically reactive MHD micropolar nanofluid flow with velocity slips and variable heat source/sink

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Abdullah Dawar ◽  
Zahir Shah ◽  
Poom Kumam ◽  
Hussam Alrabaiah ◽  
Waris Khan ◽  
...  
Keyword(s):  
Velocity Field ◽  
Heat Source ◽  
Thermal Radiation ◽  
Chemical Reaction ◽  
Biot Number ◽  
Velocity Slip ◽  
Nonlinear Thermal Radiation ◽  
Micropolar Nanofluid ◽  
Primary Order ◽  
Source Sink

AbstractThe two-dimensional electrically conducting magnetohydrodynamic flow of micropolar nanofluid over an extending surface with chemical reaction and secondary slips conditions is deliberated in this article. The flow of nanofluid is treated with heat source/sink and nonlinear thermal radiation impacts. The system of equations is solved analytically and numerically. Both analytical and numerical approaches are compared with the help of figures and tables. In order to improve the validity of the solutions and the method convergence, a descriptive demonstration of residual errors for various factors is presented. Also the convergence of an analytical approach is shown. The impacts of relevance parameters on velocity, micro-rotation, thermal, and concentration fields for first- and second-order velocity slips are accessible through figures. The velocity field heightens with the rise in micropolar, micro-rotation, and primary order velocity parameters, while other parameters have reducing impact on the velocity field. The micro-rotation field reduces with micro-rotation, secondary order velocity slip, and micropolar parameters but escalates with the primary order velocity slip parameter. The thermal field heightens with escalating non-uniform heat sink/source, Biot number, temperature ratio factor, and thermal radiation factor. The concentration field escalates with the increasing Biot number, while reduces with heightening chemical reaction and Schmidt number. The assessment of skin factor, thermal transfer, and mass transfer are calculated through tables.

Peristaltic flow of a Jeffery fluid over a porous conduit in the presence of variable liquid properties and convective boundary conditions

2019 ◽  
Vol 6 (2) ◽  
Author(s):  
G. Manjunatha ◽  
C. Rajashekhar ◽  
K. V. Prasad ◽  
Hanumesh Vaidya ◽  
Saraswati
Keyword(s):  
Boundary Conditions ◽  
Frictional Force ◽  
Variable Viscosity ◽  
Pressure Rise ◽  
Velocity Slip ◽  
Peristaltic Flow ◽  
Physical Parameters ◽  
Convective Boundary Conditions ◽  
Convective Boundary ◽  
Closed Form Solutions

The present article addresses the peristaltic flow of a Jeffery fluid over an inclined axisymmetric porous tube with varying viscosity and thermal conductivity. Velocity slip and convective boundary conditions are considered. Resulting governing equations are solved using long wavelength and small Reynolds number approximations. The closed-form solutions are obtained for velocity, streamline, pressure gradient, temperature, pressure rise, and frictional force. The MATLAB numerical simulations are utilized to compute pressure rise and frictional force. The impacts of various physical parameters in the interims for time-averaged flow rate with pressure rise and is examined. The consequences of sinusoidal, multi-sinusoidal, triangular, trapezoidal, and square waveforms on physiological parameters are analyzed and discussed through graphs. The analysis reveals that the presence of variable viscosity helps in controlling the pumping performance of the fluid.

Thermosphere Density Variability, Drag Coefficients, and Precision Satellite Orbits

2013 ◽  
Author(s):  
Craig A. McLaughlin ◽  
Dhaval M. Krishna ◽  
Piyush M. Mehta ◽  
Travis Lechtenberg ◽  
Andrew Hiatt ◽  
...  
Keyword(s):  
Satellite Orbits ◽  
Drag Coefficients

Ground Transportation: Ships

2017 ◽  
Author(s):  
Peter Rez
Keyword(s):  
Speed Of Sound ◽  
Projected Area ◽  
Drag Coefficients ◽  
Wetted Area ◽  
Large Container ◽  
Density Of Water

The drag on ships comes from movement through the water. There is a part that is analogous to the parasitic drag in aircraft, and a part that comes from creating the bow and stern waves—in some ways similar to the compressibility drag in aircraft that approach the speed of sound. Given that the density of water is more than 800 times that of air, speeds through the water are slower. Drag coefficients are specified differently for ships than for cars, trucks and airplanes. The relevant area is the total wetted area, and not the frontal projected area. Ships can be very efficient—the very powerful two-stroke diesels that power large container ships and tankers can be over 50% thermally efficient.

scholarly journals Effect of velocity slip on MHD periodic flow through irregular channel

2020 ◽  
Author(s):  
J. Sasikumar ◽  
S. Anitha ◽  
N. Harinisha
Keyword(s):  
Velocity Slip ◽  
Periodic Flow ◽  
Flow Through
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