المناصب الاكاديمية

  • 2014 2015

    Post doctoral باحث ما بعد الدكتوراه

    جامعة الأنبار - كلية الهندسة

  • 2009 2010

    مسؤول وحدة التعليم المستمر

    جامعة الأنبار - كلية الهندسة

  • 2007 2010

    عضو هيئة تحرير مجلة الانبار للعلوم الهندسية

    جامعة الأنبار - كلية الهندسة

  • 2005 2010

    مسؤول وحدة المعلومات

    جامعة الأنبار - كلية الهندسة

  • 2005 2010

    مدير الشؤون العلمية والدراسات العليا

    جامعة الأنبار - كلية الهندسة

المراحل الدراسية

  • Ph.D دكتوراه 2014

    دكتوراه

    جامعة تيناجا الوطنية

  • Master ماجستير 2005

    ماجستير

    جامعة الأنبار

  • Degree بكالوريوس 2002

    بكلوريوس

    جامعة الأنبار

الانشطة الاكاديمية

  • 1/1/2011

    High standard international journals

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    نشر | أستراليا | ضمن فريق | اللغة الانجليزية peer reviewed journals

  • 1/4/2014

    CFD

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    تقديم دورة تدريبية | ماليزيا | بمفردي | اللغة العربية Ansys

  • 1/5/2014

    Skills of Scientific research

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    المشاركة بدورة | ماليزيا | بمفردي | اللغة العربية research writing

  • 1/1/2015

    نشر 10 بحوث في مجلات عالمية ISI

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    نشر | أستراليا | ضمن فريق | اللغة الانجليزية

  • 1/2/2014

    Heat transfer and fluid flow simulation in Gambit and fluent

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    تقديم دورة تدريبية | ماليزيا | بمفردي | اللغة العربية

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Optimum thermal design of triangular, trapezoidal and rectangular grooved microchannel heat sinks

Hamdi E. Ahmed, Mirghani I. Ahmed
0 International Communications in Heat and Mass Transfer, 66, , 2015, 47–57

Abstract | ملخص البحث

A three-dimensional numerical simulation is conducted to investigate the effect of geometrical parameters on laminar water flow and forced convection heat transfer characteristics in grooved microchannel heat sink (GMCHS). Four geometry variables which are; the depth, tip length, pitch and orientation of the cavities are taken into account in order to optimize the aluminum heat sink design. These geometric parameters could change the cavity shape from triangular to trapezoidal and then to rectangular shape. The governing and energy equations are solved using the finite volume method (FVM). The performance of GMCHS is evaluated in terms of Nusselt number ratio, thermal/hydraulic performance (JF) and isotherm and streamlines contours. The results showed that the trapezoidal groove with groove tip length ratio of δ = 0.5, groove depth ratio β = 0.4, groove pitch ratio of ψ = 3.334, grooves orientation ratio of ζ= 0.00 and Re = 100 is the optimum thermal design for GMCHS with Nusselt number enhancement of 51.59% and friction factor improvement of 2.35%.

Optimization of thermal design of ribbed flat-plate fin heat sink

Hamdi E. Ahmed
0 Applied Thermal Engineering, 102, , 2016, 1422–1432

Abstract | ملخص البحث

Enhancing the thermal design of plate-fin heat sink (PFHS) leads to minimize their size and weight, and then improve the heat removal in consequently increase the speed of electronic devices. In this numerical study, an innovative thermal design of PFHS is suggested by inserting ribs in between channels in different sizes, positions, numbers and orientations in order to get an optimal thermal design of this kind of heat sinks. The two main objectives of this study are; investigating the effect of ribs on PFHS while the number of fins is kept constant, second is inserting ribs with reducing the number of fins simultaneously. Two types of reductions are investigated here, first is substrate material reduction by reducing the number of fins and adding ribs simultaneously, second is pumping power reduction by keeping the number of fins and inserting ribs with reducing the pumping of air flow to get the same thermal performance of the original heat sink (without ribs). The concrete findings show that ribbed plate-fin heat sink (RPFHS) provides thermal performance of 1.55 times greater than PFHS under corresponding conditions. But this enhancement reduces when the number of ribs increases. For the same thermal performance, the pumping power of RPFHS is reduced to 69.65% compared to PFHS case. In addition, RPFHS having five channels with 15 ribs shows hydrothermal performance of 1.37 times better than PFHS having nine channels, with reduction in the substrate material of 27.24%.

التدريس الحالي

  • الى الان 2005

    Fluid Mechanics, Heat transfer, Thermodynamics, Numerical and engineeringanalysis, Matlab,Autocad,

    عضو هيئة تدريسية لعشر سنوات خلت

الخبرة التدريسية