Construction and performance characteristics of wind tunnel design, 3rd Int. Conf. for Mech. Power Engineering, Monufia University, Cairo, Egypt. The measurements of drag resulting from small surface irregularities immersed in turbulent boundary layers, J. Experiments in Fluid, 2, pp. 197-202. Drag resulting from rearward-facing steps immersed in laminar boundary layer, Leicester University, Engineering dept., Internal Report. Effect of freestream pressure gradient on turbulent boundary layers reattachment behind a backward-facing step, 2nd Int. Joint Conf. for Mech. Engineering & Tech.(MET-2) , Zagazig - Leicester University, Cairo, Egypt, April. The turbulent boundary layer drag of large backward-facing steps, 4th Int. Joint Conf. for Mech. Engineering & Tech.(MET-4) , Zagazig- Leicester University, Cairo, Egypt. On the estimation of two-dimensional drag of surface irregularities immersed in turbulent boundary layers with pressure gradients, 4th Int. Joint Conf. for Mech. Engineering & Tech.(MET-4) , Zagazig- Leicester University Laminar boundary layer drag resulting from a backward-facing step, 4th Int. Joint Conf. for Mech. Engineering & Tech.(MET-4) , Zagazig- Leicester University, Cairo, Egypt. A performance investigation of troughs solar water heater, 4th Int. Joint Conf. for Mech. Engineering & Tech.(MET-4) , Zagazig- Leicester University, Cairo, Egypt. Separated flow associated with two-dimensional extended obstacles mounted on a flat plate, Helwan University, Research Bulletin, Faculty of Engineering, Dec. pp. 91-106, vol. 12. The yaw angle effect on the reattachment length behind isolated roughness elements, Helwan University, Research Bulletin, Faculty of Engineering, Dec. pp. 35-54, vol. 12. Critical assessment and development of an innovated wind wheel turbine (WWT), The Seventh Int. Conf. for Mech. Power Engineering pp. v/5.1-v/5.13, Cairo University, Egypt. Analytical and experimental investigation of a new type of wind wheel turbine, Conf. on the Transfer of Technology to Local Industries, College of Engineering, Sultan Qaboos University, Sultanate of Oman. Outdoor experimental results of an aluminum, CPC, collector, Conf. on the Transfer of Technology to Local Industries, College of Engineering, Sultan Qaboos University, Sultanate of Oman. Sea water desalination using a floating sponge solar still, Conf. on the Transfer of Technology to Local Industries, College of Engineering, Sultan Qaboos University, Sultanate of Oman. End-stage boundary layer transition models for engineering calculations, Part C: I. Mech. Engineering Science, U.K. vol. 208. A floating sponge solar still: design and performance, Int. J. of Solar Energy, vol. 17, pp. 61-71. Theoretical performance of wind wheel turbines, Int. J. of Solar Energy, vol. 17, pp. 145-166. Numerical prediction of Laminar-transition-turbulent layers, Helwan University, Research Bulletin, Faculty of Engineering, April, pp. 100-117, vol. 4. Digital measurements in intermittently transient flows, Helwan University, Research Bulletin, Faculty of Engineering, April, pp. 85-99, vol. 4. Flow angle effect on the drag caused by small obstacles immersed in turbulent boundary layer, Helwan University, Research Bulletin, Faculty of Engineering, April, pp. 182-194, vol. 4. Derivation of the logarithmic law of the wall for transition boundary layers, Engineering Res. Jour. ,Vol. 58, 93-108, Engineering Res. Jour. Helwan University, Faculty of Engineering, Mataria, Cairo Integral calculation of boundary layers growth on turbine blades with isolated surface roughness, Engineering Res. Jour., Vol. 59, 109-118, Helwan University, Faculty of Engineering, Mataria, Cairo. Optimization of counter flow wet cooling towers characteristics performance, Engineering Res. Jour., Vol. 65, 106-126, Helwan University, Faculty of Engineering, Mataria, Cairo. Experimental investigation of flow field characteristics over two cavities in tandem, 11th International Mechanical Power Engineering Conference (IMPEC 11), Helwan University, Faculty of Engineering, Mataria, 5-7 Feb., 2 On the thermodynamic cycles of gas turbine plants, The International Journal of Mechanical Engineering education, vol. 2, (IJMEE) Influence of porosity on the productivity of floating sponge solar still, World Renewable Energy Congress-2000, Metropole Hotel, Brighton, U.K. Assessment of two-dimensional associated with drag of grooves measurements in turbulent boundary layers, Engineering Res. Jour., Vol. 71, pp. 133-147, Helwan University, Faculty of Engineering, Mataria, Cairo. Blade geometry analysis in axial flow compressor cascade, Engineering Res. Jour. ,Vol. 72,pp. 1-19, Helwan University, Faculty of Engineering , Mataria, Cairo. Counter flow wet cooling towers analysis, Engineering Res. Jour., Vol. 72, pp. 20-38 , Helwan University, Faculty of Engineering, Mataria, Cairo, Egypt. Effect of Groove geometry on characteristics of strong adverse pressure gradient flow, Seventh Int. Congress on Fluid Dynamics & Propulsion,ICFDP7-2001016, Cairo, Egypt. Numerical prediction of transition boundary layer flows using new intermittency transport equation, The Aeronautical Journal, Royal Aeronautical Society, UK, Vol. 106, No 1060. Growth of boundary layers integral calculations on turbine blades with and without isolated surface ridges, Int. Conf. Aeronautical Science and Air Transportation, ICASAT2007-G3-02Conference Proceedings , Al Fatah University Aerodynamics Performance of Multi Gurney Flaps Configurations on Airfoil Investigating the Effect of a Single Gurney Flap Heights on Airfoil Study of Flow Instability in MTR-Reactors During Natural Circulation Analysis and Accuracy of Experimental Methods FILM COOLING PERFORMANCE USING TRANSIENT LIQUID CRYSTALS MEASUREMENTS THE EFFECT OF TIP END-BLADE GEOMETRY ON THE AXIAL FANS PERFORMANCE LES of Turbulent Mixing In Anti-Vortex Film Cooling Flows Modeling and simulation of loss of the ultimate heat sink in a typical material testing reactor Different Numerical Solutions for Rotating Stall and Surge Types in Axial Flow Compressors Performance enhancement