Abstract
In the present work, the characteristics of physical model unsteady nanofluid flow and heat transfer in an asymmetric porous channel are analyzed numerically using wavelet collocation method. Using similarity transformation, unsteady two-dimensional flow model of nanofluid in a porous channel through expanding or contracting walls has been transformed into a system of nonlinear ordinary differential equations (ODEs). Then, the obtained nonlinear system of ODEs is solved via wavelet collocation method. The effect of various emerging parameters, such as nanoparticle volume fraction, Reynolds number (Re), and expansion ratio have been analyzed on velocity and temperature profiles. Numerical results have been presented in form of figures and tables. For some special cases, the obtained numerical results are compared with exact one and found that the results are good in agreement with exact solutions.
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Abbreviations
- \( \hat{u} \) :
-
Velocity component in \( \hat{x} \) direction
- \( \hat{v} \) :
-
Velocity component in \( \hat{y} \) direction
- \( \varphi \) :
-
Nanoparticle volume fraction
- T :
-
Temperature
- R:
-
Re
- Pr:
-
Prandtl number
- p :
-
Pressure
- ρ :
-
Density
- µ :
-
Viscosity
- \( C_{\text{p}} \) :
-
Specific heat in constant pressure
- \( k \) :
-
Thermal conductivity
- \( a \) :
-
Distance between parallel plates
- \( \alpha \) :
-
Expansion and Contraction ratio
- \( {\text{Nu}} \) :
-
Nusselt Number
- t :
-
Time
- \( \nu \) :
-
Kinematic viscosity
- f:
-
Base Fluid
- nf:
-
Nanofluid
- w:
-
Wall
- l:
-
Lower wall
- u:
-
Upper wall
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Acknowledgements
The work is supported by University Grant Commission (UGC) under the D. S. Kothari Postdoctoral Fellowship scheme with grant No. MA/18-19/0013 (S-78).
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Pandit, S., Sharma, S. Wavelet strategy for flow and heat transfer in CNT-water based fluid with asymmetric variable rectangular porous channel. Engineering with Computers 38 (Suppl 1), 93–103 (2022). https://doi.org/10.1007/s00366-020-01139-z
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DOI: https://doi.org/10.1007/s00366-020-01139-z