Venkateswaran Sankaran

Learn More
This paper describes a computational infrastructure that supports Chimera-based interfacing of different CFD solvers a body-fitted unstructured grid solver with a blockstructured adaptive cartesian grid solver to perform time-dependent adaptive movingbody CFD calculations of external aerodynamics. The goal of this infrastructure is to facilitate the use of(More)
Feature-detection methods are applied to drive Cartesian-based adaptive mesh re nement for improved vortex resolution in aerodynamics ow elds. Several approaches such as the Q-criterion, the eigenvalues of velocity gradient tensor and the identi cation of local pressure minima are considered. Speci c attention is given to the automation of the renement(More)
The strand-adaptive Cartesian approach is an innovative mesh generation approach for external aerodynamics that presents signi cant advantages over established methods in terms of grid automation, accuracy, and scalability. In this work, the approach is evaluated for complex geometries and ow elds. Speci cally, strand length and strand vector smoothing are(More)
Despite the critical importance of resolving flow at or near domain boundaries, often boundary condition formulations are implemented in an ad-hoc fashion. The purpose of this work is to provide a general framework for the implementation and, importantly, the verification of boundary conditions for nodeand cell-centered finite volume schemes. These(More)
A new adaptive mesh refinement strategy is presented that couples feature-detection with local error-estimation. The goal is to guide refinement to key vortical features using feature detection, and to terminate refinement when a maximum acceptable error level has been reached. The feature detection scheme, which has been presented in previous related work,(More)
Form Approved OMB No. 0704-0188 Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden(More)
Form Approved OMB No. 0704-0188 Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden(More)