“Excrescence’s drag caused by small two-dimensional bump ridges in zero pressure gradient flow”, 3rd Int. Conf. for Mech. Power Engineering, Monufia University, Cairo, Egypt. “Construction and performance characteristics of wind tunnel design”, 3rd Int. Conf. for Mech. Power engineering, Monufia University, Cairo, Egypt "Trombe Wall Heat Transfer Analysis", Solar Energy. Research, Vol. 6 ”A skin friction correlation for rough turbulent boundary layers with pressure gradients”, International Congress of Fluid Mechanics, 3rd, Cairo, Egypt, Jan. 2-4, Proceedings. Volume 4. "Experimental Investigation of a Dual Purpose Solar Powered Flashing Chamber", Al-Azhar Engineering Second International Conference, Cairo. "Effect Of Darcian And Non-Darcian Natural Convection On The Effective Thermal Conductivity Of A Porous Medium", Int. Renwable Energy Conf., June 22-26, Amman, pp. 663-677, Vol II "Effect of High Temperature on the Removal Efficiency of HEPA Filters", Journal of Nuclear Science and Application, Sept. "Effect of Elevated Temperature on the Mechanical Strength of HEPA Filters" Journal of Nuclear Science and Application, Sept. "Effect of Elevated Temperature on the Mechanical Strength of HEPA Filters" Journal of Nuclear Science and Application, Sept. " Simulation of a Dual Purpose Solar-Powered Flashing Chamber ", Journal of Institution of Engineers, Vol.72, PP58-62, India, Feb. "Experimental And Theoretical Determination Of Thermal Conductivity Of Building And Insulating Materials," Al-Azhar Engineering Third Int. Conf., Cairo, Dec. 18-21. "Prediction Of Rough Surface Thermal Turbulent Boundary Layer"., Fifth Int. Conf. of Fluid Mechanics, January 2-5. ‘‘ Some Investigations on the Performance of Wind Turbine Blades at Different Airofoil Sections ’’ . Journal of Eng. Researches, El- mataria Faculty of Eng. Vol. 46, No. 46, Cairo, Egypt. ‘‘ Some Investigations on the Performance of Wind Turbine Blades at Different Airofoil Sections ’’ . Journal of Eng. Researches, El- mataria Faculty of Eng. Vol. 46, No. 46, Cairo, Egypt. “Heat Transfer and Pressure Drop in a Tangentially Injected Swirl Flow Through a Horizontal Tube,” Engineering Research Journal, February 1995, Cairo, Vol. 2, pp. 220-231. “Gas Dynamic Analysis for Solar Ejector Refrigeration System’’. 5th Cairo International Conference on Energy and Environment, Vol., I, Cairo. "Comparison of High Efficiency Particulates Filter Testing Methods"7Th International Conference on Indoor Air and Climate 96, Nagoya, Japan. "Experimental Investigation of Natural Convection Heat Transfer in Air Between Corrugated and Flat Plates "5Th International Conference on Energy & Envirorment,Cairo, June. "Experimental Investigation of Natural Convection Heat Transfer in Air Between Corrugated and Flat Plates "5Th International Conference on Energy & Environment, Cairo, June . “ Thermal analysis of vapour compression desalination plant”, IWTC, Feb. 26-29. “An Investigation of the Effect of Fin Spacing and Working Fluids Properties on the Performance of a Heat Pipe-Heat Exchanger (HPHE)”. Proceedings of the Int. Congress on Fluid Dynamic & Propulsion, ASME-Int. and Cairo University, Vol. 2, pp. 654-669, Dec., 29-31, Cairo. “ The Optimal Characteristics of a Horizontal Axis Wind Turbine Electric Generator System’’. Florence World Energy Symposium, Italy, 1997 (Accepted in Journal of Eng. Researches). “The Enhancement of Forced Convection Desalination ’’. 2nd International Conference for Water Treatment Technology, Alex., Egypt. “The Enhancement of Forced Convection Desalination ’’. 2nd International Conference for Water Treatment Technology, Alex. “Turbulent Boundary Layer and Heat Transfer Characteristics Over Surfaces with Stream-Wise Riblets in Adverse Pressure Gradient,” Proceedings of the 6th International Conference on Energy and Environment, May 11-14,Cairo , pp. 285-311. “ Natural convection heat transfer in enclosures with a bottom heated corrugated surface” , 1st Int. Conference for Advanced trends in engineering, Minia “Effect of Flow Entrance on Pressure Drop and Heat Transfer in Pipes,” Engineering Research Journal, Faculty of Engineering, Mataria, Helwan University, December , Cairo, Egypt, Vol. 66, pp. 16-31. “Study of the Heat Transfer and Pressure Drop Characteristics in Turbulent Air-Solids Flow in a Horizontal Pipe,” Cairo 7th International Conference on Energy and Environment, March (11-13), Cairo, Vol. 1, pp. 387-406 “ The performance of water current turbine ’’ , CHESA 2000, Proceedingsof Mech. And Heat Transfer, F11, Prague, Czech Republic. ” Exhaust emissions from an indirect injection dual-fuel engine” Proceedings of the Institution of Mechanical Engineers. Part D , vol.214, no.D3. “A Computational Investigation of the Effect of Exhaust Gas Recirculation on the Performance of a Dual Fuel Engine”, SAE Paper, No. 2000-01-2040 “Effect of pilot fuel quantity on the performance of dual fuel engine” ,Int. Journal of Energy Conversion & Management, Pergamon ,vol.41, no.6,April. “Flow and Heat Transfer Around a Cylinder Located Near a Plane Wall With Different Clearance in Cross Flow,” Proceedings of the Arab-African Conference for Refrigeration and Air Conditioning, 29th April- 1st May, Cairo, pp. 223-240. “Combustion Quasi-Two Zone Predictive Model for Dual Fuel Engines”, Int. J. Energy Conversion and Management, Vol. 42, 1477-1498 “Effects of diluents admissions and intake air temperature in exhaust gas recirculation on the emissions of an indirect injection dual fuel engine” , Energy conversion and management , vol. 42, no8, pp. 1033-1045 “Effect of injection timing on the performance of dual fuel engine”, Int. Journal of Energy Conversion & Management, Pergamon ,vol.43, pp. 269-277. "Impact of Water Desalination Technologies on Environmental Development" , Seventh International Water Technology Conference, CAIRO, JUNE 3-5. ” Nucleate pool boiling of demineralized water and acetone on smooth and roughened surfaces of aluminum alloy”, Alexandria Engineering Journal, Vol. 42 , No. 2, 179-194. “Experimental and Numerical Investigation of the Influence of Free-Stream Turbulence on Turbulent Boundary Layer Drag Reduction over Plates with Stream-Wise Micro-Grooves,” Proceedings of the Tenth International Conference on Aerospace Sciences & Aviation Technology, ASAT-10, 13-15 May,Military Technical College, Cairo, Egypt, Paper HF-5, pp. 125-151 “Experimental and numerical investigation of the influence of free stream turbulence on turbulent boundary layer drag reduction over plates with stream-wise micro-grooves” 10 th international conference on aerospace sciences & Aviation technology ( ASAT), 13-15 May , Cairo. “EFFECT OF DIFFERENT INTAKE SHAPES ON THE FLUID FLOW CHARACTERISTICS OF A RIBBED RECTANGULAR DUCT” , Engineering and Scientific Research Journal Vol.5 ,October , Cairo ”Computational St udy of Centerline Turning Angle Effect on the Turbulent Flow through a Diffusing S -Duct Using Large -Eddy Simulation”, Ninth International Congress of Fluid Dynamics & Propulsion (ICFDP 9), Alexandria. “ EXPERIMENTAL AND NUMERICAL INVESTIGATIONS OF FORCED CONVECTION OVER AN INCLINED HEATED FLAT PLATE”, Engineering Research Journal Vol. 114, Dec., 47-65. "Nucleate Pool Boiling Characteristics From Internally Coated Horizontal Tubes Using Saturated R-134a and Distilled Water", Ain Shams University, Faculty of Engineering, Vol. 43, No. 1, March. “Area ratio effect on the turbulent flow through a diffusing S-duct using Large-eddy simulation” 6th International Energy Conversion Engineering Conference (IECEC), 28 - 30 Jul , Ohio, USA. “EXPERIMENTAL INVESTIGATION OF EVAPORATIVE HEAT TRANSFER CHARACTERISTI CS AT THE 3-PHASE CONTACT LINE “,Thermopedia Meeting, 28 June 2009 , Poland.(accepted for publication , Experimental Thermal and Fluid Science, International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics, EES Elsevier , Dec. ) Effect of Operating Conditions on the NoDx Emissions From An Indirect- Injection Diesel Engine Fueled With Gaseous Fuel The Effects of Diluent Admissions and Intake Temperature in Exhaust Gas Recirculation on the Emissions of An Indirect-Injection, Dual-Fuel Engine Using Quasi-Two Zone Combustion Model to Predict the Performance of a Dual Fuel Engine A Computational Investigation of the Effect of Exhaust Gas Recirculation on the Performance of a Dual-Fuel Engine A Comprehensive Chemical Kinetic Investigation of the Combustion Processes of Lean Mixtures of Methane and Air Effect of Pilot Fuel Quantity on the Performance of a Dual- Fuel Engine A skin friction correlation for rough turbulent boundary layers with pressure gradients Nucleate pool boiling of demineralized water and acetone on smooth and roughened surfaces of aluminum alloy Effects of diluent admissions and intake air temperature in exhaust gas recirculation on the emissions of an indirect injection dual fuel engine Combustion quasi-two zone predictive model for dual fuel engines Effect of pilot fuel quantity on the performance of a dual fuel engine Experimental and numerical investigation of evaporative heat transfer in the vicinity of the 3-phase contact line Controlling the heat transfer and pressure drop within economical working conditions for a movable flat tube bundle