A new class of efficient and robust energy stable schemes for gradient flows

J Shen, J Xu, J Yang - SIAM Review, 2019 - SIAM
We propose a new numerical technique to deal with nonlinear terms in gradient flows. By
introducing a scalar auxiliary variable (SAV), we construct efficient and robust energy stable …

Convergence and error analysis for the scalar auxiliary variable (SAV) schemes to gradient flows

J Shen, J Xu - SIAM Journal on Numerical Analysis, 2018 - SIAM
We carry out convergence and error analysis of the scalar auxiliary variable (SAV) methods
for L^2 and H^-1 gradient flows with a typical form of free energy. We first derive H^2 …

Improving the accuracy and consistency of the scalar auxiliary variable (SAV) method with relaxation

M Jiang, Z Zhang, J Zhao - Journal of Computational Physics, 2022 - Elsevier
The scalar auxiliary variable (SAV) method was introduced by Shen et al. in [36] and has
been broadly used to solve thermodynamically consistent PDE problems. By utilizing scalar …

Positivity-preserving, energy stable numerical schemes for the Cahn-Hilliard equation with logarithmic potential

W Chen, C Wang, X Wang, SM Wise - Journal of Computational Physics: X, 2019 - Elsevier
In this paper we present and analyze finite difference numerical schemes for the Cahn-
Hilliard equation with a logarithmic Flory Huggins energy potential. Both first and second …

A second order accurate scalar auxiliary variable (SAV) numerical method for the square phase field crystal equation

M Wang, Q Huang, C Wang - Journal of Scientific Computing, 2021 - Springer
In this paper we propose and analyze a second order accurate (in time) numerical scheme
for the square phase field crystal equation, a gradient flow modeling crystal dynamics at the …

[HTML][HTML] An energy stable fourth order finite difference scheme for the Cahn–Hilliard equation

K Cheng, W Feng, C Wang, SM Wise - Journal of Computational and …, 2019 - Elsevier
In this paper we propose and analyze an energy stable numerical scheme for the Cahn–
Hilliard equation, with second order accuracy in time and the fourth order finite difference …

A generalized SAV approach with relaxation for dissipative systems

Y Zhang, J Shen - Journal of Computational Physics, 2022 - Elsevier
The scalar auxiliary variable (SAV) approach [31] and its generalized version GSAV
proposed in [20] are very popular methods to construct efficient and accurate energy stable …

[PDF][PDF] A second-order energy stable BDF numerical scheme for the Cahn-Hilliard equation

Y Yan, W Chen, C Wang, SM Wise - Commun. Comput. Phys., 2018 - math.umassd.edu
In this paper we present a second order accurate (in time) energy stable numerical scheme
for the Cahn-Hilliard (CH) equation, with a mixed finite element approximation in space …

A second order in time, uniquely solvable, unconditionally stable numerical scheme for Cahn–Hilliard–Navier–Stokes equation

D Han, X Wang - Journal of Computational Physics, 2015 - Elsevier
We propose a novel second order in time numerical scheme for Cahn–Hilliard–Navier–
Stokes phase field model with matched density. The scheme is based on second order …

A positivity-preserving, energy stable and convergent numerical scheme for the Poisson-Nernst-Planck system

C Liu, C Wang, S Wise, X Yue, S Zhou - Mathematics of Computation, 2021 - ams.org
In this paper we propose and analyze a finite difference numerical scheme for the Poisson-
Nernst-Planck equation (PNP) system. To understand the energy structure of the PNP …