Assessment of Computational Fluid Dynamic for Surface Combatant 5415 at Straight Ahead and Static Drift β = 20 deg

Shanti Bhushan; Hyun-Se Yoon; Frederick Stern; Emmanuel Guilmineau; Michel Visonneau; Serge Toxopeus; Claus Simonsen; Shawn Aram; Sungeun Kim; Gregory Grigoropoulos

doi:10.1115/1.4041229

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Assessment of Computational Fluid Dynamic for Surface Combatant 5415 at Straight Ahead and Static Drift β = 20 deg

Journal article

Peer reviewed

Assessment of Computational Fluid Dynamic for Surface Combatant 5415 at Straight Ahead and Static Drift β = 20 deg

Shanti Bhushan, Hyun-Se Yoon, Frederick Stern, Emmanuel Guilmineau, Michel Visonneau, Serge Toxopeus, Claus Simonsen, Shawn Aram, Sungeun Kim and Gregory Grigoropoulos

Journal of fluids engineering, Vol.141(5), 051101

05/01/2019

DOI: 10.1115/1.4041229

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Abstract

Collaboration is described on assessment of computational fluid dynamics (CFD) predictions for surface combatant model 5415 at static drift β = 0 deg and 20 deg using recent tomographic particle image velocimetry (TPIV) experiments. Assessment includes N-version verification and validation to determine the confidence intervals for CFD solutions/codes, and vortex onset, progression, instability, and turbulent kinetic energy (TKE) budget analysis. The increase in β shows the following trends. Forces and moment increase quadratically/cubically, and become unsteady due to shear layer, Karman and flapping instabilities on the bow. Wave elevation becomes asymmetric; its amplitude increases, but the total wave elevation angle remains same. The vortex strength and TKE increase by about two orders of magnitude, and for large β, the primary vortices exhibit helical mode instability similar to those for delta wings. Forces and moment for both β and wave elevation for β = 0 deg are compared within 4% of the data, and are validated at 7% interval. Wave elevation for β = 20 deg, and vortex core location and velocities for both β are compared within 9% of the data, and are validated at 12% interval. The vortex strength and TKE predictions show large 70% errors and equally large scatter and are not validated. Thus, both errors and scatter need reduction. TKE budgets show transport of turbulence into the separation bubble similar to canonical cases, but pressure transport is dominant for ship flows. Improved CFD predictions require better grids and/or turbulence models. Investigations of solution-adaptive mesh refinement for better grid design and hybrid Reynolds-averaged Navier-Stokes/large eddy simulation models for improved turbulent flow predictions are highest priority.

Computer Science

Mathematics

Mechanics

Numerical Analysis

Physics

Distributed, Parallel, and Cluster Computing

Engineering Sciences

Fluids mechanics

Mechanics of the fluids

Mechanics of the structures

Details

Title: Subtitle: Assessment of Computational Fluid Dynamic for Surface Combatant 5415 at Straight Ahead and Static Drift β = 20 deg
Creators: Shanti Bhushan - Mississippi State University
Hyun-Se Yoon - Hydroscience and Engineering [Iowa City]
Frederick Stern - University of Iowa
Emmanuel Guilmineau - Centre National pour la Recherche Scientifique et Technique (CNRST)
Michel Visonneau - Centre National pour la Recherche Scientifique et Technique (CNRST)
Serge Toxopeus - Maritime Research Institute Netherlands
Claus Simonsen - FORCE Technology,#N#DK-2605 Brøndby, Denmark#N#e-mail:
Shawn Aram - Naval Surface Warfare Center
Sungeun Kim - Naval Surface Warfare Center
Gregory Grigoropoulos - National Technical University of Athens
Resource Type: Journal article
Publication Details: Journal of fluids engineering, Vol.141(5), 051101
DOI: 10.1115/1.4041229
ISSN: 0098-2202
eISSN: 1528-901X
Publisher: American Society of Mechanical Engineers
Language: English
Date published: 05/01/2019
Academic Unit: IIHR--Hydroscience and Engineering; Mechanical Engineering
Record Identifier: 9984195161502771

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