مقایسهٔ روش‌ها

	روش مجموعه سطح	روش حجم سیال
حوزه	دینامیک سیالات	دینامیک سیالات
خانواده	Process / pipeline	Process / pipeline
سال پیدایش	1988	1981
پدیدآور	Stanley Osher	Cleve Hirt
نوع	Implicit interface tracking method	Eulerian interface tracking method
منبع بنیادین	Osher, S., & Sethian, J. A. (1988). Fronts propagating with curvature-dependent speed: algorithms based on Hamilton-Jacobi formulations. Journal of Computational Physics, 79(1), 12-49.	Hirt, C. W., & Nichols, B. D. (1981). Volume of fluid (VOF) method for the dynamics of free boundaries. Journal of Computational Physics, 39(1), 201-225.
نام‌های دیگر	Level-set, LSM, signed distance method	VOF, VoF, volume fraction method
مرتبط	5	5
خلاصه	The Level Set Method is an implicit interface tracking technique introduced by Osher and Sethian in 1988 for moving boundary problems and multiphase flows. Rather than explicitly tracking the interface, level sets represent it as the zero level set (contour) of a signed distance function φ. This approach elegantly handles topological changes, naturally computes interface curvature and normals, and integrates well with Eulerian solvers. Level sets have become essential for image processing, shape optimization, and interface-dominated fluid dynamics problems.	The Volume of Fluid (VOF) method is an Eulerian interface-tracking technique for multiphase flow simulations, developed by Hirt and Nichols in 1981. Instead of explicitly tracking the interface between phases, VOF advects a scalar field (the volume fraction) that represents the fractional volume of one phase in each grid cell. This approach elegantly handles topological changes (splashing, merging, breaking) without explicit interface reconstruction, making it ideal for complex multiphase flows on fixed Eulerian grids.