This paper presents a new volume-of-fluid scheme (M-CICSAM), capable of capturing abrupt interfaces on meshes of arbitrary topology, which is a modification to the Compressive Interface Capturing Scheme for Arbitrary Meshes (CICSAM) proposed in the recent literature. Without resort to any explicit interface reconstruction, M-CICSAM is able to precisely model the complex free surface deformation, such as interface rupture and coalescence. By theoretical analysis, it is shown that the modified CICSAM overcomes three inherent drawbacks of the original CICSAM, concerning the basic differencing schemes, the switching strategy between the compressive downwind and diffusive high-resolution schemes, and the far-upwind reconstruction technique on arbitrary unstructured meshes. To evaluate the performance of the newly proposed scheme, several classic interface capturing methods developed in the past decades are compared with M-CICSAM. The numerical results clearly demonstrate that M-CICSAM produces more accurate predictions on arbitrary meshes, especially at high Courant numbers, by reducing the numerical diffusion and preserving the interface shape. Keywords: two-phase flows; interface capturing; unstructured meshes; volume of fluid (VOF); normalized variable diagram (NVD); normalized variable and space formulation (NVSF)

No abstract

No abstract

Abstract. Delay-Tolerant Networks (DTNs) are a type of emerging networks characterized by very long delay paths and frequent network partitions. For the distinct characteristics of DTNs, routing becomes one of the most challenging open problems. Recent years numerous approaches have been presented for addressing routing issues in DTNs. This paper surveys main DTN routing strategies and gives a comparison of them with respect to the performance metrics. Specially, we summarize the cardinal mobility models and DTN simulators which are significantly important to evaluate the performance of DTN routing protocols.