Papers by Abdullah Kendoush
Journal of Aeronautics and Aerospace Engineering, Oct 4, 2014
International Journal of Thermal Sciences, 2009
Analytical solutions for heat and mass transfer to fluids flowing across an isothermal flat plate... more Analytical solutions for heat and mass transfer to fluids flowing across an isothermal flat plate were obtained. Laminar, inviscid and irrotational flow were assumed in the solution of the energy equation. The derived new relations were comparable with the experimental data and the solutions of other investigators.
Void fraction measuring techniques are reviewed with emphasis on applications to multiphase flow.... more Void fraction measuring techniques are reviewed with emphasis on applications to multiphase flow. The presentation is divided into two main sections; intrusive where the probe penetrates into the flow field, and non-intrusive where the detection is done remotely. The latter is more preferrable than the former. We subdivided the non-intrusive techniques into into two main categories; nuclear and non-nuclear. In the nuclear section, we discussed the utilization of almost all types of radiations, namely; beta, neutrons, gamma, X-ray, near infrared, in addition to the nuclear magnetic resonance. In the non-nuclear techniques, we presented the following methods; fluorescence, optical sensors, laser, autotransformer winding, ultrasonic, and photgraphy. Some other non nuclear miscellaneous techniques were discussed.
ASME 2010 Summer Bioengineering Conference, Parts A and B, 2010
Virtual mass effects generate forces that act on any object accelerating in a fluid medium. While... more Virtual mass effects generate forces that act on any object accelerating in a fluid medium. While there have been computational models of bileaflet mechanical valves that include virtual mass effects [1], current computational models of fluid structure interaction of native mitral valves do not consider virtual mass effects, resulting in an incomplete measure of the forces acting on the valve. As far as the authors aware no closed-form relationship for the virtual mass coefficient, Cm, of the native mitral valve has been determined. Integrating the effects of virtual mass into computational models of the mitral valve would result in a more complete model, and could yield more accurate and relevant results from computational models of the mitral valve.
Proceedings of the World Congress on Momentum, Heat and Mass Transfer, Apr 1, 2024
Equations were derived for the virtual mass coefficients 𝐶𝐶 𝑚𝑚 of two bubbles accelerating with t... more Equations were derived for the virtual mass coefficients 𝐶𝐶 𝑚𝑚 of two bubbles accelerating with the flow along their line of centres and perpendicular to their line of centres. The method of solution was based on potential flow. The solution proved that 𝐶𝐶 𝑚𝑚 is higher at low separation of the two side-by-side bubbles and lower at low separation of the two bubbles accelerating along their line of centres. All the derived solutions of 𝐶𝐶 𝑚𝑚 approached asymptotically the classical value of 0.5 for the single accelerating bubble. The solutions were compared favourably with other available theoretical and experimental results. Keywords: Virtual mass coefficient . Potential flow . Two bubbles . Analytical solution Consider two equal-sized bubbles (A) and (B) as shown in Fig. , where a is the radius of both bubbles and L is the distance between their centres. Assume no deformation in the shape of bubbles as they rise. Using potential flow the following equations for the velocity of rise for bubble (A)
Iraqi journal of chemical and petroleum engineering, Jun 30, 2002
Journal of Energy and Power Technology, 2021
By the adoption of a drag-buoyancy equality model, analytical solutions were obtained for the dra... more By the adoption of a drag-buoyancy equality model, analytical solutions were obtained for the drag coefficients (CD) of Taylor bubbles rising steadily in pipes. The obtained solutions were functions of the geometry of the Taylor bubble and the gas volume fraction. The solutions were applicable at a wide range of Capillary numbers. The solution was validated by comparison with experimental data of other investigators. All derived drag formulas were subject to the condition that Bond number >4, for air-water systems.
Volume 5: Multiphase Flow, 2019
Phenomenological equations derived for the convective heat and mass transfer to Taylor bubbles (T... more Phenomenological equations derived for the convective heat and mass transfer to Taylor bubbles (TB) rising in vertical cylindrical pipes. Three models presented; first for the bubble thin liquid layer region, second for the rounded nose region, and third for the wake region. The solution is confined to flat-ended Taylor bubbles under laminar flow and constant heat flux conditions. The results compared reasonably well with the experimental data of other investigators.
Proceedings of the 2nd International Conference on Fluid Flow and Thermal Science (ICFFTS'21), 2021
International Journal of Computer Applications, 2020
International Journal of Modern Studies in Mechanical Engineering, 2018
Oriental Journal of Physical Sciences, 2017
A neutron beam has been used to measure the volume fraction of crude oil in water of non- flow tw... more A neutron beam has been used to measure the volume fraction of crude oil in water of non- flow two-phase mixture experimentally.241Am-Be neutron source were used with an activity of 3.7x104 MBq. The volume fraction was simulated by using small plastic tubes filled with oil and immersed in non-flow water tube. The results show that it is feasible to measure the volume fraction of crude oil in a crude oil-water mixture.
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Papers by Abdullah Kendoush