Dr. Hazim Moria - Academia.edu (original) (raw)
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Papers by Dr. Hazim Moria
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Sains Malaysiana
This study examined and described the optical and photovoltaic (PV) characterizations of the Frui... more This study examined and described the optical and photovoltaic (PV) characterizations of the Fruit Areca catechu (pinang) as a new type of organic sensitizer. Recent reports stated that including chenodeoxycholic acid (CDCA) in the dye improves the performance of dye-sensitized solar cells (DSSCs). The effectiveness of PV dye was investigated by applying it in a DSSC. The absorption spectra indicated that natural dyes with CDCA has an excellent stabilizing ability. The Fourier-transform infrared spectra indicated the existence of carboxylic and hydroxyl functional groups in the naturally extracted dye. These functional groups were responsible for the rapid electron transfer and strong electronic linkages of interactions within the TiO2 surface. In this study, photoluminescence spectra analysis showed that by narrowing the bandgap, incorporating CDCA as a co-adsorbent in natural dye could generate a significant photocurrent. The overall power conversion efficiency was enhanced by 4.6...
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Alexandria Engineering Journal
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Case Studies in Thermal Engineering
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Applied Thermal Engineering
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Powder Technology
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Energy Conversion and Management
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Results in Physics
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International Journal of Heat and Mass Transfer
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Journal of Marine Science and Engineering
Flow-induced vibrations of a flexible cantilever plate, placed in various positions behind two si... more Flow-induced vibrations of a flexible cantilever plate, placed in various positions behind two side-by-side cylinders, were computationally investigated to determine optimal location for wake-excited energy harvesters. In the present study, the cylinders of equal diameter D were fixed at center-to-center gap ratio of T / D = 1 . 7 and immersed in sub-critical flow of Reynold number R e D = 10 , 000 . A three-dimensional Navier–Stokes flow solver in an Arbitrary Lagrangian–Eulerian (ALE) description was closely coupled to a non-linear finite element structural solver that was used to model the dynamics of a composite piezoelectric plate. The cantilever plate was fixed at several positions between 0 . 5 < x / D < 1 . 5 and - 0 . 85 < y / D < 0 . 85 measured from the center gap between cylinders, and their flow-induced oscillations were compiled and analyzed. The results indicate that flexible plates located at the centerline between the cylinder pairs experience the lowest...
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International Journal of Engineering Research and
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Energy Procedia
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Energy Procedia
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Energy Procedia
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ABSTRACT Most modern passenger cars use various add-ons including roof-rack, ski-rack, bicycle ra... more ABSTRACT Most modern passenger cars use various add-ons including roof-rack, ski-rack, bicycle rack, advertising signboard, police and ambulance siren, portable ladder and taxi signs for commercial and professional reasons. As over 80% of the required total vehicle power is essential to overcome the aerodynamic resistance (and the remaining power is used for rolling resistance), any add-ons causes extra drag to the total system hence the extra fuel cost. The primary objectives of this study were to experimentally measure the aerodynamic drag generated by various vehicle add-ons under a range of vehicle operating speeds. The study was conducted using a reduced scale (25%) detailed model of a production large family size passenger car manufactured in Australia. The aerodynamic drag coefficient was related to fuel consumption and a detailed analysis of fuel savings was performed.
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Sports Technology, 2012
The primary objective of this research is to investigate and describe the effects of swimsuits&#x... more The primary objective of this research is to investigate and describe the effects of swimsuits' surface profile and seam orientations on aerodynamic drag. Two commercial swimsuits (Speedo LZR and TYR Sayonara) materials were evaluated in a wind tunnel environment using a standard cylindrical experimental arrangement. The effects of swimsuit surface profile and seam orientations on aerodynamic drag were evaluated for a range of Reynolds numbers. The measured drag forces were converted to dimensionless drag coefficients, which were compared for both swimsuits under different conditions. The results show that the material surface structure (roughness and seam orientations) of the swimsuit has significant effect on aerodynamic drag. The seam orientation at 45° has the potential to reduce the drag by around 15% depending on the seam geometry (i.e., seam height, width, etc.) and Reynolds number. The TYR Sayonara swimsuit can provide aerodynamic advantage at low Reynolds number (e.g. below Re = 1.63 × 10) due to lower CD value. The Speedo LZR swimsuit has relative advantage at high Reynolds number (e.g. over Re = 1.63 × 10) compared to TYR Sayonara swimsuit as it has significantly lower CD values at high Reynolds number.
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Sports Technology, 2011
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Sports Technology, 2011
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Sports Technology, 2010
The primary objective of this research is to investigate and describe the effects of swimsuits&#x... more The primary objective of this research is to investigate and describe the effects of swimsuits' surface profile and seam orientations on aerodynamic drag. Two commercial swimsuits (Speedo LZR and TYR Sayonara) materials were evaluated in a wind tunnel environment using a standard cylindrical experimental arrangement. The effects of swimsuit surface profile and seam orientations on aerodynamic drag were evaluated for a range of Reynolds numbers. The measured drag forces were converted to dimensionless drag coefficients, which were compared for both swimsuits under different conditions. The results show that the material surface structure (roughness and seam orientations) of the swimsuit has significant effect on aerodynamic drag. The seam orientation at 45° has the potential to reduce the drag by around 15% depending on the seam geometry (i.e., seam height, width, etc.) and Reynolds number. The TYR Sayonara swimsuit can provide aerodynamic advantage at low Reynolds number (e.g. below Re = 1.63 × 10) due to lower CD value. The Speedo LZR swimsuit has relative advantage at high Reynolds number (e.g. over Re = 1.63 × 10) compared to TYR Sayonara swimsuit as it has significantly lower CD values at high Reynolds number.
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Sains Malaysiana
This study examined and described the optical and photovoltaic (PV) characterizations of the Frui... more This study examined and described the optical and photovoltaic (PV) characterizations of the Fruit Areca catechu (pinang) as a new type of organic sensitizer. Recent reports stated that including chenodeoxycholic acid (CDCA) in the dye improves the performance of dye-sensitized solar cells (DSSCs). The effectiveness of PV dye was investigated by applying it in a DSSC. The absorption spectra indicated that natural dyes with CDCA has an excellent stabilizing ability. The Fourier-transform infrared spectra indicated the existence of carboxylic and hydroxyl functional groups in the naturally extracted dye. These functional groups were responsible for the rapid electron transfer and strong electronic linkages of interactions within the TiO2 surface. In this study, photoluminescence spectra analysis showed that by narrowing the bandgap, incorporating CDCA as a co-adsorbent in natural dye could generate a significant photocurrent. The overall power conversion efficiency was enhanced by 4.6...
Bookmarks Related papers MentionsView impact
Alexandria Engineering Journal
Bookmarks Related papers MentionsView impact
Case Studies in Thermal Engineering
Bookmarks Related papers MentionsView impact
Applied Thermal Engineering
Bookmarks Related papers MentionsView impact
Powder Technology
Bookmarks Related papers MentionsView impact
Energy Conversion and Management
Bookmarks Related papers MentionsView impact
Results in Physics
Bookmarks Related papers MentionsView impact
International Journal of Heat and Mass Transfer
Bookmarks Related papers MentionsView impact
Journal of Marine Science and Engineering
Flow-induced vibrations of a flexible cantilever plate, placed in various positions behind two si... more Flow-induced vibrations of a flexible cantilever plate, placed in various positions behind two side-by-side cylinders, were computationally investigated to determine optimal location for wake-excited energy harvesters. In the present study, the cylinders of equal diameter D were fixed at center-to-center gap ratio of T / D = 1 . 7 and immersed in sub-critical flow of Reynold number R e D = 10 , 000 . A three-dimensional Navier–Stokes flow solver in an Arbitrary Lagrangian–Eulerian (ALE) description was closely coupled to a non-linear finite element structural solver that was used to model the dynamics of a composite piezoelectric plate. The cantilever plate was fixed at several positions between 0 . 5 < x / D < 1 . 5 and - 0 . 85 < y / D < 0 . 85 measured from the center gap between cylinders, and their flow-induced oscillations were compiled and analyzed. The results indicate that flexible plates located at the centerline between the cylinder pairs experience the lowest...
Bookmarks Related papers MentionsView impact
International Journal of Engineering Research and
Bookmarks Related papers MentionsView impact
Energy Procedia
Bookmarks Related papers MentionsView impact
Energy Procedia
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Energy Procedia
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Bookmarks Related papers MentionsView impact
ABSTRACT Most modern passenger cars use various add-ons including roof-rack, ski-rack, bicycle ra... more ABSTRACT Most modern passenger cars use various add-ons including roof-rack, ski-rack, bicycle rack, advertising signboard, police and ambulance siren, portable ladder and taxi signs for commercial and professional reasons. As over 80% of the required total vehicle power is essential to overcome the aerodynamic resistance (and the remaining power is used for rolling resistance), any add-ons causes extra drag to the total system hence the extra fuel cost. The primary objectives of this study were to experimentally measure the aerodynamic drag generated by various vehicle add-ons under a range of vehicle operating speeds. The study was conducted using a reduced scale (25%) detailed model of a production large family size passenger car manufactured in Australia. The aerodynamic drag coefficient was related to fuel consumption and a detailed analysis of fuel savings was performed.
Bookmarks Related papers MentionsView impact
Sports Technology, 2012
The primary objective of this research is to investigate and describe the effects of swimsuits&#x... more The primary objective of this research is to investigate and describe the effects of swimsuits' surface profile and seam orientations on aerodynamic drag. Two commercial swimsuits (Speedo LZR and TYR Sayonara) materials were evaluated in a wind tunnel environment using a standard cylindrical experimental arrangement. The effects of swimsuit surface profile and seam orientations on aerodynamic drag were evaluated for a range of Reynolds numbers. The measured drag forces were converted to dimensionless drag coefficients, which were compared for both swimsuits under different conditions. The results show that the material surface structure (roughness and seam orientations) of the swimsuit has significant effect on aerodynamic drag. The seam orientation at 45° has the potential to reduce the drag by around 15% depending on the seam geometry (i.e., seam height, width, etc.) and Reynolds number. The TYR Sayonara swimsuit can provide aerodynamic advantage at low Reynolds number (e.g. below Re = 1.63 × 10) due to lower CD value. The Speedo LZR swimsuit has relative advantage at high Reynolds number (e.g. over Re = 1.63 × 10) compared to TYR Sayonara swimsuit as it has significantly lower CD values at high Reynolds number.
Bookmarks Related papers MentionsView impact
Sports Technology, 2011
Bookmarks Related papers MentionsView impact
Sports Technology, 2011
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Sports Technology, 2010
The primary objective of this research is to investigate and describe the effects of swimsuits&#x... more The primary objective of this research is to investigate and describe the effects of swimsuits' surface profile and seam orientations on aerodynamic drag. Two commercial swimsuits (Speedo LZR and TYR Sayonara) materials were evaluated in a wind tunnel environment using a standard cylindrical experimental arrangement. The effects of swimsuit surface profile and seam orientations on aerodynamic drag were evaluated for a range of Reynolds numbers. The measured drag forces were converted to dimensionless drag coefficients, which were compared for both swimsuits under different conditions. The results show that the material surface structure (roughness and seam orientations) of the swimsuit has significant effect on aerodynamic drag. The seam orientation at 45° has the potential to reduce the drag by around 15% depending on the seam geometry (i.e., seam height, width, etc.) and Reynolds number. The TYR Sayonara swimsuit can provide aerodynamic advantage at low Reynolds number (e.g. below Re = 1.63 × 10) due to lower CD value. The Speedo LZR swimsuit has relative advantage at high Reynolds number (e.g. over Re = 1.63 × 10) compared to TYR Sayonara swimsuit as it has significantly lower CD values at high Reynolds number.
Bookmarks Related papers MentionsView impact