A 3-D time-domain numerical wave tank using a higher-order boundary element method is newly developed in the framework of linear potential theory, and ship waves generated by the standard Wigley model advancing at constant forward speed in otherwise calm water and the resultant steady wave resistance are computed as verification of the computer code developed. A rectangular computational domain...

Nowadays, various numerical methods are developed to extend computational fluid dynamics in engineering applications. One of the most useful methods in free surface modeling is Boundary Element Method (BEM). BEM is used to model inviscid fluid flow such as flow around ships. BEM solutions employ surface mesh at all of the boundaries. In order to model the linear free surface, BEM can be modifie...

A study of a 10/10 vertical zigzag maneuver the generic submarine Joubert BB2 is presented. CFD simulations, involving moving planes and rotating propeller using dynamic overset technique, are performed at constant rotational speed in model scale on four systematically refined grids compared against experimental data for depth, pitch, pitch rate, drift, velocity, absolute thrust torque coeffici...

Iran is the biggest pistachio producer and exporter in the world. Surely, one of the most problems of pistachio industry is Aflatoxin contamination in recent years that treated exportation this valuable crop. This research was done in order to evaluate Aflatoxin contamination in indehiscence and mechanical splitting pistachios of Ouhadi cultivars in Rafsanjan region. Treatments of this research...

A thrust estimation scheme for a marine propeller has been experimentally tested in waves and with a device that simulates the influence of a vessel hull. The scheme is formed by a nonlinear propeller torque observer and a mapping to generate the thrust from the observed torque. The mapping includes the estimation of the advance number. This is utilized to improve the performance when the prope...

Background: Antimicrobial agent has been effectively used systemically and locally in management of periodontal disease. Local drug has an advantage of higher antimicrobial concentration in subgingival site. Presently large number of herbal product researches in oral use in various from. The study researches neem extract when incorporated in LLD system used as adjunct to scaling and root planin...