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This study aims to analyze the two-dimensional ferrofluid flow in porous media. The effects of changes in parameters such as permeability parameter, buoyancy parameter, Reynolds and Prandtl numbers, radiation parameter, velocity slip parameter, energy dissipation parameter and viscosity parameter on the velocity and temperature profile are displayed numerically and graphically.

By using simplification, nonlinear differential equations are converted into ordinary nonlinear equations. Modeling is done in the Cartesian coordinate system. The finite element method (FEM) and the Akbari-Ganji method (AGM) are used to solve the present problem. The finite element model determines each parameter’s effect on the fluid’s velocity and temperature.

The results show that if the viscosity parameter increases, the temperature of the fluid increases, but the velocity of the fluid decreases. As can be seen in the figures, by increasing the permeability parameter, a reduction in velocity and an enhancement in fluid temperature are observed. When the Reynolds number increases, an increase in fluid velocity and temperature is observed. If the speed slip parameter increases, the speed decreases, and as the energy dissipation parameter increases, the temperature also increases.

When considering factors like thermal conductivity and variable viscosity in this context, they can significantly impact velocity slippage conditions. The primary objective of the present study is to assess the influence of thermal conductivity parameters and variable viscosity within a porous medium on ferrofluid behavior. This particular flow configuration is chosen due to the essential role of ferrofluids and their extensive use in engineering, industry and medicine.

This study aims to investigate the effect of the board of directors on financial performance, either directly or indirectly through the existence of risk management after the issuance of the Palestinian Code on Corporate Governance (PCCG) in Palestine.

This study presents an empirical investigation of 31 nonfinancial Palestinian-listed companies from 2010 to 2016. This study utilizes the structural equation modeling (SEM) model.

The results of the SEM model find that there is a significant positive effect of the existence of risk management and the tenure-Chief Executive Officer (CEO) on financial performance. However, CEO duality has a significant negative effect on financial performance. The results also find that the effect of CEO duality and board size are significantly positive on financial performance through the existence of risk management.

This study adds to the existing literature by investigating the effect of the board of directors on financial performance, either directly or indirectly through the existence of risk management in Palestine as one of the youngest stock exchanges in the region that assists in testing the validity of agency theory in a young and small emerging Islamic market context.

The results of this paper are significant to shareholders and managers of companies to make proper choices in order to secure the interests of stakeholders and increase the flow of capital and foreign investment.

To the best of the authors’ knowledge, it is one of the first papers to investigate the effect of the board of directors and financial performance, either directly or indirectly through the existence of risk management in Palestine.