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Papers by amjed A L W A N Kadhim

Research paper thumbnail of Electrical characterization of thermoelectric generators based on p-type Bi0.4Sb1.6Se2.4Te0.6 and n-type Bi2Se0.6Te2.4 bulk thermoelectric materials

Research paper thumbnail of Experimental and Numerical Study to Enhance of Heat Transfer Coefficient in Air Flow Using Microchannel

Journal of University of Babylon for engineering sciences, Jul 3, 2018

Experimental and numerical study of fluid flow and heat transfer in microchannel airflow is inves... more Experimental and numerical study of fluid flow and heat transfer in microchannel airflow is investigated. The study covers changing the cooling of micro-channel for the velocities and heater powers. The dimensions of the microchannel were, length = 0.1m, width = 0.001m, height = 0.0005 m. The experimental and numerical results were compared with the previous paper for velocities up to 20 m/s and heater powers up to 5 W and the comparison was acceptable. In this paper, the results were extended numerically for velocities up to 60 m/s. The numerical solution used finite volume (SIMPLE algorithm) to solve Navier Stokes equations (continuity, momentum and energy). The results show that the heat transfer coefficient increases up to 220 W/m 2 o C for velocity 60 m/s.

Research paper thumbnail of Heat Transfer Enhancement in Air Duct Flow By Micro-Channel Experimental And Numerical Investigation

IOP Conference Series: Materials Science and Engineering, 2020

The heating of air flow through micro-channel was studied experimentally and numerically to exami... more The heating of air flow through micro-channel was studied experimentally and numerically to examine the improvement in the thermal performance achieved by micro-channel. Numerically, laminar incompressible 3D steady-state Navier Stokes equations were solved by Finite volume method. Experimentally, a rig was built to investigate the cooling of air flow through micro-channel for different velocities and electric powers heater. The micro-channels block (length = 0.1, width = 0.05, height = 0.005 m) was manufactured from copper metal with 10 rectangular micro-channels (length = 0.1, width = 0.001, height = 0.0005 m). The performance of the microchannel was evaluated through exit air temperature value. The studied parameters numerically and experimentally were air velocities inside micro-channels (1 to 20 m/s) and heater powers (1 to 5 W). The comparison between numerical and experimental results was acceptable and reached 3% as maximum. Also the results were compared with other investig...

Research paper thumbnail of Experimental and Numerical Study to Enhance of Heat Transfer Coefficient in Air Flow Using Microchannel

Journal of University of Babylon for Engineering Sciences, 2018

Experimental and numerical study of fluid flow and heat transfer in microchannel airflow is inves... more Experimental and numerical study of fluid flow and heat transfer in microchannel airflow is investigated. The study covers changing the cooling of micro-channel for the velocities and heater powers. The dimensions of the microchannel were, length = 0.1m, width = 0.001m, height = 0.0005 m. The experimental and numerical results were compared with the previous paper for velocities up to 20 m/s and heater powers up to 5 W and the comparison was acceptable. In this paper, the results were extended numerically for velocities up to 60 m/s. The numerical solution used finite volume (SIMPLE algorithm) to solve Navier Stokes equations (continuity, momentum and energy). The results show that the heat transfer coefficient increases up to 220 W/m2 oC for velocity 60 m/s.

Research paper thumbnail of The antimicrobial potential of honey from United Arab Emirates on some microbial isolates

Medical science monitor : international medical journal of experimental and clinical research, 2005

The study investigated activity of honey towards pathogens when grown in media contained honey, o... more The study investigated activity of honey towards pathogens when grown in media contained honey, or when honey was added to cultures after inoculation. 1--Staphylococcus aureus (S. aureus), Streptococcus pyogenes (S. pyogenes), E.coli and Candida albicans (C. albicans) were cultured into broth containing 10-100% (wt/v) honey concentrations. 2--Honey was added to broth inoculated with isolates after inoculation. 3--Optimum growth of isolates, therapeutic period of honey, and time after addition of honey that showed optimum effect was measured. The optimum growth of E. Coli and C. Albicans was 10 hrs and S. aureus was 12 hrs. Honey (30-70%) prevents growth of all isolates. Honey (80%) inhibited growth of small (1 microl) and large size of inoculum (10 microl) of E. Coli and S. Aureus when added to their cultures during 24 hrs after inoculation. Honey inhibited growth of C. Albicans when added during 2 to 6 hrs after inoculation. Honey delayed the appearance of microbial growth on the p...

Research paper thumbnail of Electrical characterization of thermoelectric generators based on p-type Bi0.4Sb1.6Se2.4Te0.6 and n-type Bi2Se0.6Te2.4 bulk thermoelectric materials

Research paper thumbnail of Experimental and Numerical Study to Enhance of Heat Transfer Coefficient in Air Flow Using Microchannel

Journal of University of Babylon for engineering sciences, Jul 3, 2018

Experimental and numerical study of fluid flow and heat transfer in microchannel airflow is inves... more Experimental and numerical study of fluid flow and heat transfer in microchannel airflow is investigated. The study covers changing the cooling of micro-channel for the velocities and heater powers. The dimensions of the microchannel were, length = 0.1m, width = 0.001m, height = 0.0005 m. The experimental and numerical results were compared with the previous paper for velocities up to 20 m/s and heater powers up to 5 W and the comparison was acceptable. In this paper, the results were extended numerically for velocities up to 60 m/s. The numerical solution used finite volume (SIMPLE algorithm) to solve Navier Stokes equations (continuity, momentum and energy). The results show that the heat transfer coefficient increases up to 220 W/m 2 o C for velocity 60 m/s.

Research paper thumbnail of Heat Transfer Enhancement in Air Duct Flow By Micro-Channel Experimental And Numerical Investigation

IOP Conference Series: Materials Science and Engineering, 2020

The heating of air flow through micro-channel was studied experimentally and numerically to exami... more The heating of air flow through micro-channel was studied experimentally and numerically to examine the improvement in the thermal performance achieved by micro-channel. Numerically, laminar incompressible 3D steady-state Navier Stokes equations were solved by Finite volume method. Experimentally, a rig was built to investigate the cooling of air flow through micro-channel for different velocities and electric powers heater. The micro-channels block (length = 0.1, width = 0.05, height = 0.005 m) was manufactured from copper metal with 10 rectangular micro-channels (length = 0.1, width = 0.001, height = 0.0005 m). The performance of the microchannel was evaluated through exit air temperature value. The studied parameters numerically and experimentally were air velocities inside micro-channels (1 to 20 m/s) and heater powers (1 to 5 W). The comparison between numerical and experimental results was acceptable and reached 3% as maximum. Also the results were compared with other investig...

Research paper thumbnail of Experimental and Numerical Study to Enhance of Heat Transfer Coefficient in Air Flow Using Microchannel

Journal of University of Babylon for Engineering Sciences, 2018

Experimental and numerical study of fluid flow and heat transfer in microchannel airflow is inves... more Experimental and numerical study of fluid flow and heat transfer in microchannel airflow is investigated. The study covers changing the cooling of micro-channel for the velocities and heater powers. The dimensions of the microchannel were, length = 0.1m, width = 0.001m, height = 0.0005 m. The experimental and numerical results were compared with the previous paper for velocities up to 20 m/s and heater powers up to 5 W and the comparison was acceptable. In this paper, the results were extended numerically for velocities up to 60 m/s. The numerical solution used finite volume (SIMPLE algorithm) to solve Navier Stokes equations (continuity, momentum and energy). The results show that the heat transfer coefficient increases up to 220 W/m2 oC for velocity 60 m/s.

Research paper thumbnail of The antimicrobial potential of honey from United Arab Emirates on some microbial isolates

Medical science monitor : international medical journal of experimental and clinical research, 2005

The study investigated activity of honey towards pathogens when grown in media contained honey, o... more The study investigated activity of honey towards pathogens when grown in media contained honey, or when honey was added to cultures after inoculation. 1--Staphylococcus aureus (S. aureus), Streptococcus pyogenes (S. pyogenes), E.coli and Candida albicans (C. albicans) were cultured into broth containing 10-100% (wt/v) honey concentrations. 2--Honey was added to broth inoculated with isolates after inoculation. 3--Optimum growth of isolates, therapeutic period of honey, and time after addition of honey that showed optimum effect was measured. The optimum growth of E. Coli and C. Albicans was 10 hrs and S. aureus was 12 hrs. Honey (30-70%) prevents growth of all isolates. Honey (80%) inhibited growth of small (1 microl) and large size of inoculum (10 microl) of E. Coli and S. Aureus when added to their cultures during 24 hrs after inoculation. Honey inhibited growth of C. Albicans when added during 2 to 6 hrs after inoculation. Honey delayed the appearance of microbial growth on the p...