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DY: Fachverband Dynamik und Statistische Physik

DY 25: Critical Phenomena and Phase Transitions

DY 25.11: Talk

Thursday, March 14, 2013, 12:15–12:30, H46

Determination of line tension in the 3d Ising model using GPUs — •Benjamin Block, Suam Kim, Peter Virnau, and Kurt Binder — University of Mainz, Germany

Heterogeneous nucleation barriers are influenced by line tension effects [1]. We apply an efficient implementation of the Ising model on graphic cards [2] to quantify this effect in detail. In an Ising system with aperiodic boundary conditions in one dimension, a liquid vapor interface can be stabilized between two walls. When wall fields are applied, this leads to a difference in the Free Energy of the system. This change can be quantified in dependence on the linear dimensions of the simulation box and by varying the size of the box in all dimensions, the contribution of line tension can be extracted. [1] D. Winter, P. Virnau, K. Binder, PRL 103, 225703 (2009). [2] B. Block, EPJ-ST 210, 147 (2012).