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  • RPI SCOREC - Technical Reports
    Mesh Partition Improvement Year 2015 Journal SIAM Journal on Scientific Computing Volume Submitted Abstract Partitioning unstructured meshes for parallel adaptive workflows running on leader ship class systems requires the application of scalable partitioning tools that meet the needs of each workflow step The combination of the hyper graph methods with two criteria partition improve ment to hundreds of thousands of cores was previously presented 23 51 This work generalizes the

    Original URL path: http://www.scorec.rpi.edu/reports/view_report.php?id=665 (2015-07-15)
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  • RPI SCOREC - Technical Reports
    due to their high lift performance Turbulent flow simulations of these configurations require very fine mesh spacings especially near the walls thereby making use of a boundary layer mesh necessary However it is difficult to accurately determine the required mesh resolution a priori to the simulations In this paper we use an anisotropic adaptive meshing approach including adaptive control of elements in the boundary layers and study its effectiveness for

    Original URL path: http://www.scorec.rpi.edu/reports/view_report.php?id=616 (2015-07-15)
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  • RPI SCOREC - Technical Reports
    results of the EUROLIFT DLR F11 multi element wing configuration obtained with a highly scalable finite element solver PHASTA This work was accomplished as a part of the 2nd high lift prediction workshop In house meshes were constructed with increasing mesh density for analysis A solution adaptive approach was used as an alternative and its effectiveness was studied by comparing its results with the ones obtained with other meshes Comparisons

    Original URL path: http://www.scorec.rpi.edu/reports/view_report.php?id=617 (2015-07-15)
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  • RPI SCOREC - Technical Reports
    meshes are often used for turbulent boundary layer flows These meshes not only account for complex geometry but also maintain highly anisotropic graded and layered elements near the walls However for engineering flow problems the mesh spacing required to achieve a given level of accuracy cannot be determined a priori and therefore an adaptive approach becomes essential For wall bounded turbulent flows such an approach must incorporate the structure of

    Original URL path: http://www.scorec.rpi.edu/reports/view_report.php?id=618 (2015-07-15)
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  • RPI SCOREC - Technical Reports
    set of parallel procedures for anisotropic mesh adaptation accounting for mixed element types used in boundary layer meshes i e the presented procedures operate in parallel on distributed boundary layer meshes The procedures accept anisotropic mesh metric field as an input for the desired mesh size field and apply local mesh modifications to adapt the mesh in order to match the specified mesh size field The procedures fully account for

    Original URL path: http://www.scorec.rpi.edu/reports/view_report.php?id=619 (2015-07-15)
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  • RPI SCOREC - Technical Reports
    flow control devices regulate the FSI in order to control the dynamic response of the structure that is involved As a first step to use active control computationally efficient reduced order models are required The reduced order models must be able to predict the nonlinear structural dynamic response given an incoming flow condition This paper presents a computationally efficient method for the construction of a hybrid reduced order model for

    Original URL path: http://www.scorec.rpi.edu/reports/view_report.php?id=620 (2015-07-15)
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  • RPI SCOREC - Technical Reports
    by a pitched synthetic jet placed in a laminar Blasius boundary layer with zero pressure gradient Simulations are performed for various permutations of jet parameters including pitch angle i e 60 75 and 90 degrees blowing ratio i e Cb 0 5 1 0 1 5 and 2 0 and non dimensional actuation frequency i e 0 05 0 1 0 2 and 0 4 Cases corresponding to the full

    Original URL path: http://www.scorec.rpi.edu/reports/view_report.php?id=621 (2015-07-15)
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  • RPI SCOREC - Technical Reports
    shear gusting or a combination of these conditions Under these conditions cyclic blade loading occurs and dynamic stall phenomenon is possible which in turn results in hysteresis and causes vibrations in turbine components Therefore it is important to mitigate or even fully suppress dynamic stall In this paper we use numerical simulations to study synthetic jet based active flow control to mitigate dynamic stall The goal is to achieve fast time response control with actuators that require low energy input and are physically compact We focus on the NREL Phase VI turbine with the S809 airfoil shape The baseline con figuration without synthetic jets is modeled at below rated 7 m s rated 10 m s and above rated 15 m s wind speeds and at a yaw angle of 30 It is found that the unsteady loading due to yaw misalignment can cause power fluctuations of up to 9kW or 135 for each blade during one blade revolution Next we study active flow control on a pitching S809 airfoil with a synthetic jet actuator where two wind conditions are considered that correspond to the yaw angle of 30 for two wind speeds of 10 and 15 m s at

    Original URL path: http://www.scorec.rpi.edu/reports/view_report.php?id=622 (2015-07-15)
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