Dr. Hazim Moria - Academia.edu (original) (raw)

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Papers by Dr. Hazim Moria

Research paper thumbnail of Melting performance enhancement of thermal storage system by utilizing shape and position of double fin

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Research paper thumbnail of Effect of Chenodeoxycholic Acid on the Performance of Dye-sensitized Solar Cells utilizing Pinang Palm (Areca catechu) Dye

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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Research paper thumbnail of Boiling heat transfer characteristics of graphene oxide nanoplatelets nano-suspensions of water-perfluorohexane (C6F14) and water-n-pentane

Alexandria Engineering Journal

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Research paper thumbnail of Thermal/ exergy and economic efficiency analysis of circumferentially corrugated helical tube with constant wall temperature

Case Studies in Thermal Engineering

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Research paper thumbnail of Performance and profit analysis of thermoelectric power generators mounted on channels with different cross-sectional shapes

Applied Thermal Engineering

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Research paper thumbnail of Boiling flow of graphene nanoplatelets nano-suspension on a small copper disk

Powder Technology

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Research paper thumbnail of Operation analysis, response and performance evaluation of a pulsating heat pipe for low temperature heat recovery

Energy Conversion and Management

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Research paper thumbnail of Optoelectronic properties of electron beam-deposited NiOx thin films for solar cell application

Results in Physics

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Research paper thumbnail of Profit and efficiency boost of triangular vortex-generators by novel techniques

International Journal of Heat and Mass Transfer

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Research paper thumbnail of Vibration Performance of a Flow Energy Converter behind Two Side-by-Side Cylinders

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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Research paper thumbnail of Economic and Environmental Value for Electrical and Electronic Waste Recycling in North African Countries

International Journal of Engineering Research and

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Research paper thumbnail of Experimental Study of Solar Based Refrigerator Using Thermoelectric Effect

Energy Procedia

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Research paper thumbnail of A review on aerodynamics and hydrodynamics in sports

Energy Procedia

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Research paper thumbnail of Effect of Various Deflectors on Drag Reduction for Trucks

Energy Procedia

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Research paper thumbnail of Experimental study of aerodynamic behaviour of stretchable sport fabrics

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Research paper thumbnail of Effects of Vehicle Add-Ons on Aerodynamic Performance

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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Research paper thumbnail of Comparative aerodynamic analysis of commercial swimsuits

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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Research paper thumbnail of Aerodynamic behaviour of stretchable sports fabrics

Sports Technology, 2011

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Research paper thumbnail of Aerodynamics of ski jumping suits

Sports Technology, 2011

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Research paper thumbnail of Comparative aerodynamic analysis of commercial swimsuits

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.

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Research paper thumbnail of Melting performance enhancement of thermal storage system by utilizing shape and position of double fin

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Effect of Chenodeoxycholic Acid on the Performance of Dye-sensitized Solar Cells utilizing Pinang Palm (Areca catechu) Dye

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

Research paper thumbnail of Boiling heat transfer characteristics of graphene oxide nanoplatelets nano-suspensions of water-perfluorohexane (C6F14) and water-n-pentane

Alexandria Engineering Journal

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Research paper thumbnail of Thermal/ exergy and economic efficiency analysis of circumferentially corrugated helical tube with constant wall temperature

Case Studies in Thermal Engineering

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Performance and profit analysis of thermoelectric power generators mounted on channels with different cross-sectional shapes

Applied Thermal Engineering

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Boiling flow of graphene nanoplatelets nano-suspension on a small copper disk

Powder Technology

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Research paper thumbnail of Operation analysis, response and performance evaluation of a pulsating heat pipe for low temperature heat recovery

Energy Conversion and Management

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Research paper thumbnail of Optoelectronic properties of electron beam-deposited NiOx thin films for solar cell application

Results in Physics

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Profit and efficiency boost of triangular vortex-generators by novel techniques

International Journal of Heat and Mass Transfer

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Vibration Performance of a Flow Energy Converter behind Two Side-by-Side Cylinders

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

Research paper thumbnail of Economic and Environmental Value for Electrical and Electronic Waste Recycling in North African Countries

International Journal of Engineering Research and

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Experimental Study of Solar Based Refrigerator Using Thermoelectric Effect

Energy Procedia

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A review on aerodynamics and hydrodynamics in sports

Energy Procedia

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Effect of Various Deflectors on Drag Reduction for Trucks

Energy Procedia

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Experimental study of aerodynamic behaviour of stretchable sport fabrics

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Effects of Vehicle Add-Ons on Aerodynamic Performance

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

Research paper thumbnail of Comparative aerodynamic analysis of commercial swimsuits

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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Research paper thumbnail of Aerodynamic behaviour of stretchable sports fabrics

Sports Technology, 2011

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Research paper thumbnail of Aerodynamics of ski jumping suits

Sports Technology, 2011

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Comparative aerodynamic analysis of commercial swimsuits

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.

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