Muhammad Sofwan Mohamad
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Preferred name
Muhammad Sofwan Mohamad
Official Name
Muhammad Sofwan, Mohamad
Alternative Name
Mohamad, M. Sofwan
Mohamad, Muhammad Sofwan
Mohamad, M. S.
Main Affiliation
Scopus Author ID
57212167755
Researcher ID
DGC-8778-2022

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  • Publication
    Maximum spreading diameter of a water droplet after impact on a hot surface beyond Leidenfrost temperature
    ( 2023-01-01)
    Juhar M.Z.F.
    ;
    Muhammad Sofwan Mohamad
    ;
    Suhaimi Illias
    ;
    Nasrul Amri Mohd Amin
    ;
    Suhaila Hussain
    ;
    Ani M.H.
    The impact of liquid droplets on heated surfaces are relevance across a range of applications. The maximum spreading diameter of water droplet during impact on hot surface was experimentally studied. The surface was made of aluminium. The diameter and height of the aluminium block was 70.0 mm and 30.0 mm, respectively. During experiment, the test surface was heated beyond Leidenfrost temperature. A high-speed video camera was used to capture the droplet images from the first impact until the droplet reached maximum spreading condition. The frame rate was set to be 2,000 fps. Distilled water was used as the test liquid. The impact height was set to be about 65.0 mm. From the high-speed images analysis, the droplet diameter was found to be approximately 4.5 mm. The measured droplet maximum spreading diameters were found to have a good agreement with theoretical calculation.
      2  29
  • Publication
    Flow fluctuation during flow boiling of binary mixtures in high aspect ratio microchannel
    (IOP Publishing, 2023)
    Arif Widyatama
    ;
    Mandi Venter
    ;
    Muhammad Sofwan Mohamad
    ;
    Jacob Dirker
    ;
    Daniel Orejon
    ;
    Khellil Sefiane
    Flow boiling performance is affected by several factors, such as channel characteristics and working fluid types. It is found that there is still limited study that discusses the use of binary mixtures combined with high aspect ratio microchannels. The aim of this study is to investigate the flow fluctuation during flow boiling of binary mixtures in rectangular microchannels. Here, a 6 mm width and 0.3 mm depth rectangular channel was utilised, and it represents a hydraulic diameter of 571 μm and an aspect ratio of 20. In the present works, a mass flux of 10 kg m−2 s−1 was used, and the heat flux ranged from 15.2 and 21.0 kW m−2. The image processing technique was applied to track the bubble tail movement. In addition, the thermal camera was utilised to gather the wall temperature distribution of the channel. The preliminary results show that the use of binary mixtures influences the vapour fraction in the channel and the flow fluctuation characteristics. Some differences are observed in terms of wall temperature characteristics. However, the rapid increase of wall temperature is found in the outlet region for high flux cases under all liquid types which suggests the dominance of dry out event.
      2  6
  • Publication
    Impact of intake manifold geometry on power and torque: a simulation-based study
    (Semarak Ilmu Publishing, 2025)
    Muhammad Hussein Akbar Ali
    ;
    Zuradzman Mohamad Razlan
    ;
    Shahriman Abu Bakar
    ;
    Eswanto
    ;
    Naoki Maruyama
    ;
    Girrimuniswar Ramasamy
    ;
    Muhammad Sofwan Mohamad
    ;
    Rishan Murali
    ;
    Azizul Aziz Ishak
    ;
    Muhammad Faiz Hilmi Rani
    The internal combustion engine (ICE) remains pivotal in motorcycle technology, primarily due to its efficiency, energy density, and established infrastructure, despite the rise of electric vehicles. This study examines the influence of intake manifold design parameters on the performance of a single-cylinder internal combustion engine (ICE), with a specific focus on brake power and brake torque at high engine speeds. A comprehensive parametric analysis was conducted using a 1D simulation model in Ricardo Wave, evaluating the effects of manifold length, diameter, and bending angle on engine performance metrics. The results demonstrate that the optimized intake manifold design yields a 7.75% improvement in brake power and a 6.5% enhancement in brake torque at 10,000 RPM compared to the baseline configuration. Mid-range values for manifold length and diameter were found to achieve optimal airflow dynamics, effectively minimizing pressure losses. Additionally, a bending angle of 70° exhibited superior stability in power delivery at elevated engine speeds. These findings underscore the critical role of intake manifold geometry optimization in achieving enhanced engine performance under high-speed operating conditions.