ORCID Profile
0000-0002-4235-964X
Current Organisation
University of Jordan
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Publisher: Inderscience Publishers
Date: 2011
Publisher: ASMEDC
Date: 2009
Abstract: A broad reliability prediction method that can deal with complex thermo-fluidic systems is introduced. The procedure provides an engineering tool by integrating multiple computational packages to enable the simulation of a wide array of systems, especially those involving physics interactions such as fluid flow and solid medium. Computational Fluid Dynamics (CFD), Finite Element Method (FEM), Monte Carlo Simulation (MCS), and Fatigue analysis tools are integrated within this approach. CFD simulation is used to determine the heat convection terms used for the transient FEM analysis. Maximum thermal stress is provided by the FEM analysis whereby the fatigue life of the component is evaluated. Due to uncertainty of input parameters, the fatigue life will be in a Probability Density Function (PDF) form, which provides the relationship between the reliability and the service life of the system. The complete procedure is demonstrated using a cylindrical ring model, and then validated using experimental data gathered for power plant boiler pipes. The results show good agreement between the two methods.
Publisher: IEEE
Date: 12-2011
Publisher: ASMEDC
Date: 2009
Abstract: Many engineering thermal systems involve a high degree of technical risk. Their deterioration could be induced by the flow of high temperature fluids. A high-fidelity assessment tool is presented which enables the simulation of a wide array of thermal systems. It is based on linking multiple computational tools to deal with complex thermal systems. These systems may involve fluid-structure interactions. Computational Fluid Dynamics (CFD), Finite Element Method (FEM), and Fatigue tools are integrated within this approach. The CFD part of the method is first applied to an existing model, where the internal and external heat transfer coefficients are determined, and then compared to the manually-computed coefficients. The results showed good agreement between the two methods. Next, the process is applied to a simple cylindrical ring model, where CFD simulation is first performed to determine the heat transfer parameters that are needed for the transient FEM simulation. The FEM analysis results in the maximum thermal stress whereby the fatigue life of the component is computed. Finally, the effect of varying the turbulence intensity on heat transfer coefficients, thermal stress, and fatigue life is investigated.
Publisher: ASMEDC
Date: 2008
Abstract: A general procedure for reliability prediction is introduced. The procedure is applied to a cylindrical ring and can be used for any similar thermal application. The procedure is classified as a physics-based reliability prediction method. It utilizes different computational tools such as Computational Fluid Dynamics (CFD), Finite Element Method (FEM), and Monte Carlo Simulations (MCS). The process starts with CFD simulation to find the convective terms necessary for the transient FEM thermal analysis. The transient FEM thermal analysis provides values for thermal stress. These values are used in the fatigue life analysis. The end result is the fatigue life of the component. As a result of input parameters uncertainty, the resulting life will be in the form of a Probability Density Function (PDF), which enables the calculation of the reliability of the component.
Publisher: ASMEDC
Date: 2008
Abstract: A method that links several commercially available tools to estimate the fatigue life of thermal systems is introduced. The procedure provides an engineering tool based on existing computational packages. It is sufficiently general that it can be used for any thermal application involving fluid flow and a solid medium. A cylindrical ring model is presented to clarify the process. Computational Fluid Dynamics (CFD) and Finite Element Modeling (FEM) tools are integrated within the proposed approach. ANSYS/CFX® and Simulation® are used for such purpose. The process starts with CFD simulation to determine the convective terms necessary for the transient FEM thermal analysis. The transient FEM thermal analysis provides maximum thermal stress values. These values are employed in the fatigue life analysis to determine the fatigue life of the component.
No related grants have been discovered for Osama Al-Habahbeh.