514 citations · 1.7k across the 51 of their papers we have counts for
5 papers · 1 filter
Towards Scalable Parallel-in-Time Turbulent Flow Simulations
Qiqi Wang, Steven Gomez, Patrick Blonigan +2
We present a reformulation of unsteady turbulent flow simulations. The initial condition is relaxed and information is allowed to propagate both forward and backward in time. Simul…
The drag-adjoint field of a circular cylinder wake at Reynolds numbers 20, 100 and 500
Qiqi Wang, Junhui Gao
This paper analyzes the adjoint solution of the Navier-Stokes equation. We focus on flow across a circular cylinder at three Reynolds numbers, Re_D=20, 100 and 500. The quantity of…
Least Squares Shadowing sensitivity analysis of chaotic limit cycle oscillations
Qiqi Wang, Rui Hu, Patrick Blonigan
The adjoint method, among other sensitivity analysis methods, can fail in chaotic dynamical systems. The result from these methods can be too large, often by orders of magnitude, w…
Forward and Adjoint Sensitivity Computation of Chaotic Dynamical Systems
Qiqi Wang
This paper describes a forward algorithm and an adjoint algorithm for computing sensitivity derivatives in chaotic dynamical systems, such as the Lorenz attractor. The algorithms c…
Input Subspace Detection for Dimension Reduction in High Dimensional Approximation
Paul G. Constantine, Qiqi Wang
This manuscript is superseded by Constantine, Dow, and Wang's "Active Subspaces in Theory and Practice: Applications to Kriging Surfaces" [SIAM J. of Sci. Comput., 36 (2014), pp. A…