Seminar 30th April 2015 2 p.m. Boldrewood Campus B176 Room 2013
Understanding of Fluid Dynamic Problems: CFD, Model tests and full scale measurements
Dr Dmitriy Ponkratov
Lloyds Register
- Categories
- NGCM
- Submitter
- Luke Goater
Abstract
Despite of the fact that full scale measurements look like the most realistic, there are a lot uncertainties (hull roughness, wind, waves, current, water depth) which may affect the results. Moreover, they are usually scarce and even when available they are incomplete for validation purposes. Model tests can help to avoid these uncertainties as it is possible to simulate pure calm conditions in towing tank. However, the results can be again not realistic because of the scale effect. CFD has a possibility to calculate ships in full scale avoiding any scaling problems, but the numerical methods should be carefully validated, ideally against full scale measurements. So It can be concluded that only investigations in all three directions can help to better understand the fluid dynamic problems.
Biography
Dr. Dmitriy Ponkratov graduated the Saint-Petersburg State Marine Technical University, Russia in 2005. While writing his PhD thesis in 2006-2008, he was a Consultant to Marine Technology Research Institute in Norway and Ship Scientific Research Centre in China. Prior joining Lloyd’s Register he was an Associate Professor in Norway. Currently he holds the position of Senior Consultant at Lloyd’s Register, Technical Investigation Department, Southampton, UK. He is responsible for managing various Fluid Dynamic projects such as Computational Fluid Dynamic (CFD) investigations, model tests attendance, sea trials attendance, full scale cavitation observations, under water propeller inspections etc. He is a member of Royal Institution of Naval Architects, member of Technical Committee of International Society of Offshore and Polar Engineers and Chartered Engineer.