Fatinnabila Kamal
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Preferred name
Fatinnabila Kamal
Official Name
Fatinnabila, Kamal
Alternative Name
Kamal, Fatinnabila
Main Affiliation
Scopus Author ID
57204171852
Researcher ID
FDL-9665-2022

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Stability analysis on convection boundary layer stagnation-point flows over a permeable stretching/shrinking surface

2019 , Fatinnabila Kamal

In this thesis, several problems of convection boundary layer flow and heat transfer towards a stretching/shrinking surface along with stability analysis for viscous, nanofluid and micropolar fluids are investigated. There are five problems considered, namely (i) stagnation-point flow and heat transfer over a permeable stretching/shrinking sheet with heat source effect; (ii) magnetohydrodynamic stagnation-point flow towards a permeable stretching/shrinking sheet with slip and heat source/sink effects; (iii) effect three-dimensional stagnation-point flow and heat transfer over a permeable stretching/shrinking sheet with heat source effects in viscous fluid; (iv) MHD stagnation-point flow towards a permeable stretching/shrinking sheet in a nanofluid with chemical reaction; and (v) stagnation-point flow and heat transfer in a micropolar fluid towards a nonlinearly permeable stretching/shrinking sheet. The study starts with the formulations of the mathematical models for every problems. Next, in solving these problems, the governing nonlinear partial differential boundary layer equations are transformed into ordinary differential equations using similarity transformations before being solved numerically using the boundary value problem solver, bvp4c built in Matlab software. The numerical results are then presented in tables and graphs for the skin friction coefficient, the local Nusselt number and the local Sherwood number as well as the velocity, temperature and concentration profiles. The effects of governing parameters have been analysed such as the heat source parameter, the chemical reaction parameter, the suction/injection parameter, the micropolar parameter and the stretching/shrinking parameter. It is observed that the suction/injection effect increase the skin friction coefficient, the local Nusselt number, and the local Sherwood number. Heat source effect has decrease the heat transfer rate. Furthermore, the effect of chemical reaction effect has decrease the local Sherwood number while Micropolar parameter has decrease the skin friction coefficient and heat transfer rate. Further, dual solutions are found for a certain range of the stretching/shrinking parameter. A stability analysis has been carried out to determine which solution is stable for dual solutions exist in all problems considered. The first solution is found to be stable and physically reliable, whereas the second solution is unstable as time passes, thus impractical in the real world applications for a long run.

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Effect of suction on the stagnation point flow and heat transfer over a stretching shrinking sheet in a porous medium with stability analysis

2019-12 , Noormaizatulnazuha Mohamad , Fatinnabila Kamal , Wan Mohd Khairy Adly Wan Zaimi

This research investigatesthe problem of stagnation point flow and heat transfer over a stretching/shrinking sheet past a porous medium with suction effect. Firstly, the mathematical model that governed the fluid flow and heat transfer were formulated. Then, the governing nonlinear partial differential equations were transformed into ordinary differential equations using similarity transformation. The system of ordinary differential equations is then solved numerically using bvp4cfunction in Matlab software. The effect of suction on the skin friction coefficient and the local Nusselt number,as well as the velocity and temperature profiles,are obtained and analysed. The numerical result obtained ispresented in the form of graphs and tables. The dual solutions are obtained for a certain range of parameters. The stability analysis has been performed and the result showsthat the upper branch solution is stable while thelower branch solution is unstable

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Analisis Kestabilan Aliran Genangan bagi Bendalir Mikrokutub terhadap Permukaan Mencancang dengan Fluks Haba Ditetapkan

2020-04-01 , Fatinnabila Kamal , Zaimi K. , Ishak A.

The purpose of this study was to investigate the stability of fluid flow for the problem of stagnation flow in a micropolar fluid towards a vertical permeable surface with prescribed heat flux. The governing nonlinear partial differential equations are transformed into a system of nonlinear ordinary differential equations using a similarity transformation which are then solved numerically using the boundary value problem solver, bvp4c built in MATLAB software. The numerical results are obtained for the skin friction coefficient, local Nusselt number as well as the velocity and temperature profiles for some values of the governing parameters involved. Dual solutions are found to exist for a certain range of the bouyancy parameter or the mixed convection parameter in both assisting and opposing flows. A stability analysis is performed to determine which solution is stable in a long run. It is found that only one of the solutions is stable as time passes.

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UWB-Based Early Breast Cancer Existence Prediction Using Artificial Intelligence for Large Data Set

2023-01-01 , Ahmad Ashraf Abdul Halim , Vijayasarveswari Veeraperumal , Allan Melvin Andrew , Mohd Najib Mohd Yasin , Mohd Zamri Zahir Ahmad , Hossain K. , Bari B.S. , Fatinnabila Kamal

Breast cancer is the most often identified cancer among women and the main reason for cancer-related deaths worldwide. The most effective methods for controlling and treating this disease through breast screening and emerging detection techniques. This paper proposes an intelligent classifier for the early detection of breast cancer using a larger dataset since there is limited researcher focus on that for better analytic models. To ensure that the issue is tackled, this project proposes an intelligent classifier using the Probabilistic Neural Network (PNN) with a statistical feature model that uses a more significant size of data set to analyze the prediction of the presence of breast cancer using Ultra Wideband (UWB). The proposed method is able to detect breast cancer existence with an average accuracy of 98.67%. The proposed module might become a potential user-friendly technology for early breast cancer detection in domestic use.

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