Control of Interface Evolution in Multiphase Fluid Flows

Banas L, Klein M, Prohl A (2014)
SIAM Journal on Control and Optimization 52(4): 2284-2318.

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Abstract
We consider an optimal control problem for the interface in a two-dimensional multiphase fluid problem. The minimization functional consists of two parts: the L-2-distance to a given density profile and the interfacial length. We show existence and derive necessary first order optimality conditions for a corresponding phase-field approximation of the perimeter functional. An unconditionally stable fully discrete scheme which is based on low order finite elements is proposed, and convergence of corresponding iterates to solutions of the limiting optimality conditions for vanishing discretization parameters is shown. Computational studies are included to validate the model including the phase-field approximation, interface motion, and topological changes, as well as to study relative effects due to discretization, regularization errors, and the relation of both parts of the functional.
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Banas L, Klein M, Prohl A. Control of Interface Evolution in Multiphase Fluid Flows. SIAM Journal on Control and Optimization. 2014;52(4):2284-2318.
Banas, L., Klein, M., & Prohl, A. (2014). Control of Interface Evolution in Multiphase Fluid Flows. SIAM Journal on Control and Optimization, 52(4), 2284-2318. doi:10.1137/120896530
Banas, L., Klein, M., and Prohl, A. (2014). Control of Interface Evolution in Multiphase Fluid Flows. SIAM Journal on Control and Optimization 52, 2284-2318.
Banas, L., Klein, M., & Prohl, A., 2014. Control of Interface Evolution in Multiphase Fluid Flows. SIAM Journal on Control and Optimization, 52(4), p 2284-2318.
L. Banas, M. Klein, and A. Prohl, “Control of Interface Evolution in Multiphase Fluid Flows”, SIAM Journal on Control and Optimization, vol. 52, 2014, pp. 2284-2318.
Banas, L., Klein, M., Prohl, A.: Control of Interface Evolution in Multiphase Fluid Flows. SIAM Journal on Control and Optimization. 52, 2284-2318 (2014).
Banas, Lubomir, Klein, Markus, and Prohl, Andreas. “Control of Interface Evolution in Multiphase Fluid Flows”. SIAM Journal on Control and Optimization 52.4 (2014): 2284-2318.
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