“Effect of Tip Clearance on the Secondary Flow Losses Downstream of a Linear Cascade of Turbine Blades,” Proceedings of The Seventh International Conference of Mechanical Power Engineering, December (17-20), Cairo University, Egypt, pp. V/4-1-V/4-12 “Heat Transfer and Pressure Drop in a Tangentially Injected Swirl Flow Through a Horizontal Tube,” Engineering Research Journal, February , Cairo, Egypt, Vol. 2, pp. 220-231. “An Experimental Study on Heat Transfer and Pressure Drop of Air – Solids Turbulent Flow Inside a Horizontal Tube With Different Entrance Angles,” Journal of Engineering and Applied Science, Faculty of Engineering, Cairo University, August, Egypt, Vol. 42, No. 4, pp. 801-815. “An Experimental Investigation of Forced Convection Heat Transfer Over a Horizontal Flat Plate in a Porous Medium,” Journal of Engineering and Applied Science, Faculty of Engineering, Cairo University, August , Egypt, Vol. 46, No. 4, pp. 693-710. “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, Egypt, Vol. 1, pp. 387-406. “ Experimental Study of Non-Darcian Forced Convection Heat Transfer in Packed Circular Tube,” Proceedings of 11 th International Mechanical Power Engineering Conference (IMPEC 11), February (5-7), Helwan University, Cairo, Egypt, Vol. 1, pp. H75-H91. “Heat Transfer Enhancement in a Tangentially Injected Swirl Flow Through a Roughened Tube” Al-Azhar Engineering Sixth International Conference, September (1-4), Cairo, Egypt, Vol. 7, pp. 175-190. “ Heat Transfer to a Tangentially Injected Swirl Flow Through an Artificially Roughened Annulus,” Proceedings of 9th International Conference on Aerospace Sciences and Aviation Technology, May (8-10), Military Technical College, Kobry Elkobbah, Cairo, Egypt, Vol. 1, pp. 633-650. “Heat Transfer of Turbulent Air-Solids Flow in a Straight Tube Situated Downstream of T-Junction With Different Diameters,” Journal of Engineering Research, Faculty of Engineering, Mataria, Helwan University, August , Cairo, Egypt, Vol. 76, pp. 145-162 “Experimental Study of Flow and Heat Transfer Around a Cylinder in Three Staggered Cylinders in Cross Flow,” Scientific Bulletin, Faculty of Engineering, Ain Shams University, March, Cairo, Egypt, Vol. 37, No. 1, pp. 489-502. “Flow and Heat Transfer Characteristics Around a Cylinder in Three and Four Staggered Cylinders in Cross Flow,” Scientific Bulletin, Faculty of Engineering, Ain Shams University, June , Cairo, Egypt, Vol. 38, No. 2, pp. 853-872. “Heat Transfer Characteristics of Gravity Assisted Heat Pipes With Inserting Concentric Finned Tubes,” Engineering Research Journal, Faculty of Engineering, Mataria, Helwan University, October , Cairo, Egypt, Vol. 89, pp. M14 –M41. “Influence of Free-Stream Turbulence on Turbulent Drag Reduction and Heat Transfer Enhancement Over Plates With Stream-Wise V-Micro-Grooves,” Engineering Research Journal, Faculty of Engineering, Mataria, Helwan University, August , Cairo, Egypt, Vol. 94, pp. M23-M44. “Numerical and Experimental Study of Turbulent Flow and Convective Heat Transfer in a Circular Tube With Disc-Baffles,” Engineering Research Journal, Faculty of Engineering, Mataria, Helwan University, December, Cairo, Egypt, Vol. 96,pp. M37-M61. “Heat Transfer and Flow Friction for Helically Rib-Roughened Tube Having Entrance Bends with Different Turning Angles and Diameters,” Engineering Research Journal, Faculty of Engineering, Mataria, Helwan University, October , Cairo, Egypt, Vol. 101, pp. M16-M34. “The Effect of Surface Roughness on the Performance of Gravity Assisted Heat Pipes with Wire Mesh Screen Wicks,” Scientific Bulletin, Faculty of Engineering, Ain Shams University, June , Cairo, Egypt, Vol. 41, No. 2, pp. 709-733. "Flow and Heat Transfer Characteristics Around a Combination of Elliptic Cylinders in-Line,” Eighth International Congress of Fluid Dynamics & Propulsion, Shram El-Shiekh, Sinai, Egypt, December 14-17, ICFDP8EG166. “Forced Convection Heat Transfer and Flow Around Three Staggered Elliptic Cylinders in Cross Flow,” Engineering Research Journal, Helwan University, Faculty of Engineering, Mataria, February , Cairo, Egypt, Vol. 109, pp. M118-M136 “Experimental and Numerical Study of Forced Convection Heat Transfer From an Inclined Heated Plate Placed Beneath a Porous Medium,” Al-Azhar Engineering Ninth International Conference, April 12-14, Cairo, Egypt, Vol. 2, No. 4, pp. 187-210 “Forced Convection Heat Transfer of Turbulent Pulsating Flow Through an Axisymmetric Sudden Expansion Pipe with Different Diameter Ratios,” Al-Azhar Engineering Ninth International Conference, April 12-14, Cairo, Egypt, Vol. 2, No. 4, pp. 156-174. “Heat Transfer Characteristics and Flow Behavior Around Four Elliptic Cylinders in Staggered Arrangement,” Scientific Bulletin, Faculty of Engineering, Ain Shams University, September , Cairo, Egypt, Vol. 42, No. 2. pp. 1119-1141. "Experimental and Numerical Investigation of Natural Convection Heat Transfer in Horizontal Elliptic Annuli,” International Journal of Chemical Reactor Engineering,Vol. 6, Article A45, pp. 1-26 "Experimental Investigation of The Performance of Gravity Assisted Heat Pipes Having Wicks Filled with Porous Medium,” Ain Shams Journal of Mechanical Engineering (ASJME), Faculty of Engineering, Ain Shams University, April , Cairo, Egypt, Vol. 1, pp. 89-107. "Influence of Free Stream Turbulence Intensity on Heat Transfer and Flow Around Four In-Line Elliptic Cylinders in Cross Flow,” International Journal of Chemical Reactor Engineering, Vol. , Article A , pp. 1-17 "Heat Transfer between Fluidized Bed and Horizontal Bundle of Tubes in a Vertical Channel," International Journal of Chemical Reactor Engineering, Vol., Article , pp. 1-27 Heat Transfer and Flow Behavior around Four Staggered Elliptic Cylinders in Cross Flow Heat Transfer and Friction Factor of Turbulent Flow through A Horizontal Semi-Circular Duct Natural Convection Heat Transfer in A Horizontal Concentric Elliptic Annulus Containing Saturated Porous Media Heat Transfer Characteristics of Rotating Triangular Thermosyphon Forced Convection Heat Transfer from Three Dimensional Bodies in Cross-Flow