## 1 Introduction
Their results showed that g-jitter had a vital role in the onset of thermo-solutal convective flow. [PERSON] et al. [13] studied the impact of g-jitter on micropolar convective flow from an extendable sheet. They found that the rate of heat and mass transfer increased, whereas, the reduced skin friction decreased as the angle of inclination increased. It was further noted that as the buoyancy ratio parameter increased, the rate of heat and mass transfer, as well as reduced skin friction, were decreased. [PERSON] et al. [14] studied the combined convective flow of a second-grade non-Newtonian fluid from a tilted stretching surface. Many manufacturing processes involve both high-temperature effects and porous media ([PERSON] [15], [PERSON] et al. [16]). Radiation heat transfer is significant in the former case ([PERSON] et al. [17]). In many technological applications, such as hypersonic flight, missile reentry, rocket combustion chambers, solar pond, fluidized bed heat exchangers, and gas-cooled nuclear reactors, etc., _radiation_ as a method of energy transmission also plays a significant role ([PERSON] [18]). Porous media arise in petroleum engineering, foam manufacture, geothermics, among other areas ([PERSON] et al. [19]). Porous media are also deployed in high-temperature heat exchangers, combustion devices, filtration systems, etc. Porous materials are cooled by forcing the liquid/gas through solid capillaries and are also used to insulate a heated body to maintain its temperature ([PERSON] and [PERSON] [20]). Further implementations of porous media in 21 st-century technologies include solar collectors to increase efficiency for storage ([PERSON] et al. [19]). Numerous studies of the radiative-convective flows (which focus on illustrating the radiative heat transfer contribution in coupled processes), in porous media, have been reported, and are motivated by among other areas, thermal insulation engineering and materials fabrication systems. Some relevant recent studies include [PERSON] and [PERSON] [21], [PERSON] et al. [22], and, recently, [PERSON] and [PERSON] [23]. These investigations have generally employed algebraic flux models to simulate the uni-directional radiative contribution to heat transfer and include the Rosseland diffusion,Cogley-Vincenti-Giles non-gray flux model, Schuster-Schwartzchild two-flux model, Chandrasekhar discrete ordinates model, etc. This circumvents the need to solve the formidable integrodifferential radiative transfer equation and greatly simplifies numerical computations. The Rosseland model is the most amenable in boundary layer flows and permits radiative effects to be considered using a unique dimension-free parameter (Rosseland number). Many authors [16; 17; 18; 19; 20; 21; 22; 23] have applied a linear Rosseland approximation in steady/unsteady flows. However, this model has limited accuracy in high-temperature circumstances, as elucidated in [24] (and the references quoted therein) and leads to inaccuracies even for optically thick scenarios. Several researchers have, therefore, considered the consequence of nonlinear radiation on the flow field and energy transfer, and relevant work in this regard includes [PERSON] [24], [PERSON] and [PERSON] [25], [PERSON] [26], [PERSON] et al. [27] and [PERSON] et al. [28]. In the case of fluid-saturated porous media, the Darcy drag force model, is the most popular, although it is only applicable to low-speed viscous-dominated (\"creeping\") flows. Many scholars ([PERSON] and [PERSON] [29], [PERSON] et al. [30], [PERSON] et al. [31], [PERSON] et al. [32]) have used this model for porous media nanofluid modeling. Most of these nanofluid studies applied convectional _no-slip_ conditions at the solid-fluid interface. However, as mentioned by [PERSON] [33], in many cases, namely, rarefied gas dynamics [34], flow overcoated/rough/striated surfaces [35], and most superhydrophobic nano-surfaces [36], slip on a solid surface takes place.