Abstract
In many industrial processes such as paper manufacturing, optical fibre, nanowires, and coating, the process design engineers are concerned with efficient heat and mass transfer rates near bounding surfaces of the fluid machinery. The prime objective of the study is to analyse the effects of a binary chemical reaction and Arrhenius activation energy in a quadratic combined convective magneto nanofluid flow about a moving slender cylinder. In addition, the study comprises activation energies and binary chemical reactions for species diffusion, namely liquid hydrogen and oxygen diffusions, which are often employed as control mechanisms for efficient heating and cooling processes. The highly coupled nonlinear partial differential equations (NPDEs) with boundary constraints have been used to model the flow problem, which are then converted into a dimensionless set of equations by utilizing non-similar transformations. Further, the obtained set of NPDEs would be linearized via the quasilinearization technique and then numerically solved by the implicit finite difference method. The study’s interesting and important results are that the rising activation energy values increase the species concentration distributions and decrease the same for chemical reaction parameters. The augmenting values of the quadratic convection and thermophoresis characteristics enhance the nanoliquid’s velocity and temperature, respectively.
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Abbreviations
- \( {\text{Gr}} = \frac{{g\,\beta _{1} (1 - \phi _{\infty } )\,(T_{{\text{w}}} - T_{\infty } )\,z^{3} }}{{\nu ^{2} }} \) :
-
Grashof number
- \({\text{Nr}} = \frac{{(\rho_{{\text{P}}} - \rho_{{\text{f}}} )(\phi_{{\text{w}}} - \phi_{\infty } )}}{{\rho_{{\text{f}}} \beta_{{\text{T}}} (T_{{\text{w}}} - T_{\infty } )(1 - \phi_{\infty } )}}\) :
-
Nanoparticle buoyancy ratio parameter
- \({\text{Re}} \, = \,\frac{{U_{0} z}}{\nu }\) :
-
Reynolds number
- \({\text{Nb}} = \frac{{{\text{JD}}_{{\text{B}}} (\phi_{{\text{w}}} - \phi_{\infty } )}}{\nu }\) :
-
Brownian motion parameter
- \({\text{Nt}} = \frac{{{\text{JD}}_{{\text{T}}} (T_{{\text{w}}} - T_{\infty } )}}{{\nu T_{\infty } }}\) :
-
Thermophoresis parameter
- \({\text{Le}} = \frac{\nu }{{D_{{\text{B}}} }}\) :
-
Lewis number
- \({\text{Nc}}_{1} = \frac{{\beta_{3} (C_{{1_{{\text{w}}} }} - C_{{1_{\infty } }} )}}{{\beta_{1} (T_{{\text{w}}} - T_{\infty } )}}\) :
-
Buoyancy ratio parameter of liquid hydrogen
- \({\text{Nc}}_{2} = \frac{{\beta_{5} (C_{{2_{{\text{w}}} }} - C_{{2_{\infty } }} )}}{{\beta_{1} (T_{{\text{w}}} - T_{\infty } )}}\) :
-
Buoyancy ratio parameter of oxygen
- \({\text{Pr}} = \frac{\nu }{{\alpha_{{\text{m}}} }}\) :
-
Prandtl number
- \({\text{Ri}} = \frac{{{\text{Gr}}}}{{{\text{Re}}^{2} }}\) :
-
Richardson number
- \({\text{Sc}}_{1} = \frac{\nu }{{D_{{{\text{S}}_{1} }} }}\) :
-
Schmidt number for liquid hydrogen
- \({\text{Kc}}_{1} = \frac{{K_{{{\text{r}}1}} \nu }}{{U_{\infty }^{2} }}\) :
-
Chemical reaction parameter for liquid hydrogen
- \({\text{Kc}}_{2} = \frac{{K_{{{\text{r}}2}} \nu }}{{U_{\infty }^{2} }}\) :
-
Chemical reaction parameter for liquid oxygen
- \(E_{1} = \frac{{{\text{Ea}}_{1} }}{{k_{1}^{*} T_{\infty } }}\) :
-
Modified Arrhenius activation energy for liquid hydrogen
- \(E_{2} = \frac{{{\text{Ea}}_{2} }}{{k_{2}^{*} T_{\infty } }}\) :
-
Modified Arrhenius activation energy for liquid oxygen
- \({\text{Sc}}_{2} = \frac{\nu }{{D_{{{\text{S}}_{2} }} }}\) :
-
Schmidt number for oxygen
- \(J = \frac{{\rho_{{\text{P}}} C_{{{\text{PP}}}} }}{{\rho_{{\text{f}}} C_{{{\text{Pf}}}} }}\) :
-
Ratio of heat capacities of nanoparticles and the fluid
- \(\gamma = \,\frac{{\beta_{2} }}{{\beta_{1} }}\left( {T_{{\text{w}}} - T_{\infty } } \right)\) :
-
The nonlinear mixed convection parameter
- \(\varepsilon = \,2\frac{{U_{{\text{w}}} }}{{U_{\infty } }}\) :
-
Velocity ratio parameter
- \(D_{{\text{B}}}\) :
-
Brownian diffusion coefficient (m2 s−1)
- \(C_{{\text{f}}}\) :
-
Surface-friction coefficient
- \(f\) :
-
Dimensionless stream function
- \(F\) :
-
Dimensional velocity distribution
- \(g\) :
-
Acceleration due to gravity (ms−2)
- \(G\) :
-
Temperature distribution (K)
- \(T_{{\text{w}}} ,\,\,T_{\infty }\) :
-
, Wall and ambient temperature conditions (K)
- \(D_{{\text{T}}}\) :
-
Thermophoretic diffusion coefficient (m2 s−1)
- \(C_{{{\text{pf}}}}\) :
-
Specific heat of the fluid due to constant pressure \(({\text{JK}}^{ - 1} )\)
- \(C_{{1{\text{w}}}} ,C_{{2{\text{w}}}}\) :
-
Liquid hydrogen and liquid oxygen concentration at the wall
- \( C_{{1\infty }} ,C_{{2\infty }} \) :
-
Mainstream values of species concentration liquid hydrogen and liquid oxygen
- \(C_{{{\text{pp}}}}\) :
-
Specific heat of nanoparticles \(({\text{JK}}^{ - 1} )\)
- \({\text{Nu}}\) :
-
Nusselt number
- R :
-
Slender cylinder radius (m)
- \(n_{1} ,n_{2}\) :
-
Rate constants for liquid hydrogen and oxygen
- \({\text{Ea}}_{1} ,{\text{Ea}}_{2}\) :
-
The activation energy for liquid hydrogen and oxygen (KJ/mol)
- P :
-
Concentration distribution of liquid oxygen
- r :
-
Radial coordinate (m)
- \(H\) :
-
Concentration distribution of liquid hydrogen
- \({\text{Sh}}_{1} ,{\text{Sh}}_{2}\) :
-
The mass transport rate of liquid hydrogen and oxygen
- \({\text{NSh}}\) :
-
Nanoparticle Sherwood number
- S :
-
Nanoparticle volume fraction distribution
- \(\alpha_{{\text{m}}}\) :
-
Thermal diffusivity
- \(\rho_{p}\) :
-
Nanoparticle mass density (Kg m−3)
- \(\xi\) :
-
Transverse curvature
- \(\phi\) :
-
Volume fraction of nanoliquid
- \(\beta_{{{\text{C}}_{1} }} ,\beta_{{{\text{C}}_{2} }}\) :
-
Nonlinear liquid hydrogen and oxygen expansion coefficients
- \(\eta\) :
-
Non-dimensional coordinate
- \(\nu\) :
-
Kinematic viscosity (m2 s−1)
- \(\phi_{\infty }\) :
-
Nanofluid volume fraction at ambient region
- \(\rho_{{\text{f}}}\) :
-
Density of regular liquid (Kgm−3)
- \(\rho\) :
-
Nanofluid density (Kgm−3)
- \(\psi\) :
-
Stream function
- \(\phi_{{\text{w}}}\) :
-
Nanofluid volume fraction at the wall
- \(\lambda\) :
-
Temperature difference parameter (K)
- \(U_{0}\) :
-
Reference velocity (ms−1)
- \(U_{{\text{w}}}\) :
-
Wall velocity (ms−1)
- \(u\) :
-
Axial velocity component (ms−1)
- \(U_{\infty }\) :
-
Free stream velocity (ms−1)
- \(v\) :
-
Radial velocity component (ms−1)
- \(z\) :
-
Axial coordinate (m)
- \(w,\infty\) :
-
Conditions at the wall and infinity
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Patil, P.M., Kulkarni, M. Influence of activation energy and applied magnetic field on triple-diffusive quadratic mixed convective nanoliquid flow about a slender cylinder. Eur. Phys. J. Plus 137, 520 (2022). https://doi.org/10.1140/epjp/s13360-022-02647-1
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DOI: https://doi.org/10.1140/epjp/s13360-022-02647-1