A Shape-Maintained and Low-Dissipation Fluid Guiding Pipeline

Fluid guiding methods could generate high-resolution simulation results from basic low-resolution simulation results, rather than direct simulation. However, because of dissipation, the high-resolution results always leads to huge shape differences from low-resolution inputs. Previous fluid guiding methods often use complex fluid control methods or artificial force to reduce shape differences. Such approaches need to change the existing fluid simulation method as input. In contrast, we propose a novel fluid guiding pipeline by two basic groups of low-resolution simulation results. It takes balance between physical accuracy and fluid shape, without changing the existing generation method. In addition, we proposed an objective shape similarity evaluation criterion based on finite-time Lyapunov exponent, in order to determine the similarity between fluid shapes. Experimental results demonstrated that our pipeline could quickly generate shape-maintained and low-dissipation high-resolution simulation results. It is much easier to implement than previous fluid guiding methods.