Evaluation of an adaptive unstructured remeshing technique for integrated fluid-thermal-structural analysis
An adaptive unstructured remeshing technique is evaluated for integrated fluid-thermal-structural analysis. The technique is combined with the finite element method to solve: (1) the Navier-Stokes equations for high-speed compressible flow; (2) the energy equation for the structural-thermal response; and (3) the quasi-static equilibrium equations for the structural response. The remeshing technique and the analysis solution procedure are described. The effectiveness of the approach is evaluated with two application studies. The flow analysis of Mach 8 shock-shock interference on a three-inch-diameter cylinder is used as the first application study to demonstrate the capability of the remeshing technique and to examine proper remeshing indicators for the inviscid and boundary layer regions. The applicability of the approach for the thermal and structural analyses of the structure is evaluated in the second application study of a 0.25-inch-diameter convectively cooled leading edge subjected to intense aerodynamic heating. Issues associated with remeshing indicators for thermal stress problems are identified.
- Research Organization:
- National Aeronautics and Space Administration, Hampton, VA (USA). Langley Research Center
- OSTI ID:
- 6750917
- Report Number(s):
- N-90-20426; NASA-TM--102611; NAS--1.15:102611; CONF-900153--
- Country of Publication:
- United States
- Language:
- English
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Adaptive remeshing method for finite element thermal analysis
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Related Subjects
420400* -- Engineering-- Heat Transfer & Fluid Flow
AERODYNAMIC HEATING
COMPRESSIBLE FLOW
DIFFERENTIAL EQUATIONS
EQUATIONS
FINITE ELEMENT METHOD
FLOW MODELS
FLUID FLOW
HEATING
MATHEMATICAL MODELS
NAVIER-STOKES EQUATIONS
NUMERICAL SOLUTION
PARTIAL DIFFERENTIAL EQUATIONS
STRESS ANALYSIS
STRESSES
THERMAL STRESSES