کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
797022 1466607 2013 20 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Two-dimensional water entry and exit of a body whose shape varies in time
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Two-dimensional water entry and exit of a body whose shape varies in time
چکیده انگلیسی

The two-dimensional water entry and exit of a body whose shape varies in time in a prescribed way is investigated through analytical and numerical modelling. For this purpose, an analytical model has been developed which extends the modified Logvinovich model of water impact to bodies with time-varying shape. A modified von Karman approach has been developed to describe the exit stage, and a rational derivation of the water exit model which is in use in offshore engineering is presented. CFD simulations are used to assess the accuracy of the analytical model. Several case studies of water entry and exit are presented. The analytical model provides very good force predictions during the entry stage in all cases, but the accuracy of the model in the exit stage depends on the maximum penetration depth. In particular, the appearance of high fluid forces on the body directed downward in both the entry and exit stages is remarkable.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Fluids and Structures - Volume 40, July 2013, Pages 317–336
نویسندگان
, , , , ,