$r$	Coordinate measured in radial direction
$\left(u,v\right)$	Velocity components along $x$ and $r$ directions
${\mu }_{nf}$	Effective dynamic viscosity of nanofluid
${\rho }_{nf}$	Density of nanofluid
${\upsilon }_{nf}$	Kinematic viscosity of nanofluid
$k^{*}$	Darcy-permeability of the porous medium
$C_b$	Drag coefficient
${\varphi }_d$	Volume fraction of dust particles
$K$	Stokes resistance
$N$	Number density of dust particles
$\sigma$	Electric conductivity
$B_0$	Applied magnetic field
$m$	Hall parameter
md	Mass concentration of the dust particles
knf	Effective thermal conductivity of the nanofluid
(ρCp)nf	Effective heat capacitance of the nanofluid
N 1	Density of the particle phase
τv	Relaxation time of dust particles
τT	Thermal equilibrium time
τw	Shear stress at the surface
${\dot{S}}^{‴}{}_{GEN}$	Entropy generation rate per unit volume
$\left(u_p,v_p\right)$	Velocity components of particle phase in x and r directions
$c_m$	Specific heat of the dust particles
$u_w$	Velocity of the moving needle
$u_{\infty }$	Velocity outside the boundary layer
$T$	Dimensional temperature of the nanofluid
$T_p$	Temperature of the dust particle
$T_w$	Constant surface temperature of the thin needle
$T_{\infty }$	Ambient temperature
$\lambda$	Porosity parameter
$F_r$	Forchheimer parameter
$\alpha$	Dust particles mass concentration
$\beta$	Fluid particle interaction parameter for velocity
$M$	Magnetic field parameter
$Pr$	Prandtl number
$N_r$	Nonlinear radiation parameter
${\theta }_r$	Temperature ratio parameter
$Ec$	Eckert number
${\beta }_T$	Fluid particle interaction parameter for temperature
$\gamma$	Ratio of specific heat
$q_w$	Surface heat flux
$N_S$	Entropy generation number