This study deals with the influence of a wavy interface separating two layers filled with power law fluid and porous media, respectively. The governing equations are solved using the Finite Element Method (FEM) and the numerical model is validated by comparing with experimental findings. The parameters governing the studied configuration are varied as: Rayleigh number (10³ ≤ Ra ≤ 10⁶), power law index (0.6 ≤ n ≤ 1.4), Darcy number (10⁻² ≤ Da ≤ 10⁻⁶), buoyancy ratio (0.1 ≤ N ≤ 10) and Lewis number (1 ≤ Le ≤ 10). It is inferred that the temperature gradient increases by augmenting the Rayleigh number, as the flow is observed from the vertical to horizontal direction in both layers. Constant enhancement in the heat and mass transfer is also observed by enriching the buoyancy effect. Moreover, the average Nusselt and Sherwood numbers decline by increasing the width of the porous layer.

This study deals with the effect of the power law index on the convective heat transfer of hybrid nanofluids in a square cavity divided into three layers. The effect of a solid fluid layer is also given attention. A two-dimensional system of partial differential equations is discretized by using the generalized finite element method (FEM). A FEM having cubic polynomials (P3) is employed to approximate the temperature and velocity components, whereas the pressure is approached using quadratic finite element functions. The discretized set of equations have been solved using Newton’s method. The numerical code which is used in this study has been validated by comparing with experimental findings. Mathematical simulations are performed for different sets of parameters, including the Rayleigh number (between ${10}^3$ and ${10}^6$), the power law index (between $0.6$ to $1.8$), Darcy number (between ${10}^{-6}$ to ${10}^{-2}$), undulation (between 1 and 5) and the thermal conductivity ratio (between $0.1$ and 10). The results infer that a remarkable penetration of streamlines is figured out towards the porous hybrid layer as the power law index is increased. The average $Nu$ increases with increasing $Ra$, and the maximum value is noted at $Ra={10}^6$. There is no much alteration observed for isotherms at the solid layer by increasing $Da$. The average $Nu$ decreases by increasing the undulations. The rate of heat transfer is enhanced at the heated boundary and solid fluid interface of the cavity by raising the ratio of thermal conductivity.

ADSD (Agile Distributed Software Development) is a growing trend for software development organizations to develop quality software with limited cost and time. However, it gives rise to additional situational challenges. Situational variations result in unstable agile architecture which gets highly affected. Although the present literature focuses on agile architecture but effect of situational variation on the agile architecture still needs consideration. One possible solution is development of conceptual model and incorporation of multiple situational factors. This research study aims to identify the most relevant situations and propose situational ADSD approach for the development of situation-based software architecture framework for agile distributed projects. The study focuses on agile methods, rendering identified situational variations. The approach is developed through analyzing data from literature and their associated work documents. Comprehensive survey helps to bridge the gaps from conceptual to architecture model. The experimental results are acquired through both practical and statistical analysis. The results support Conway’s law, e.g. correlation that maps architecture with the communication and coordination needs. Correlation results show that architecture has major contribution in ADSD and validate the relationship among conceptual model and architecture model. The results also suggest that stable architecture in ADSD can positively affect the product.