# SHIP NUMERICALHYDRODYNAMICS

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iten
Code
84419
2019/2020
CREDITS
6 credits during the 2nd year of 8738 Naval Architecture and Marine Engineering (LM-34) GENOVA
SCIENTIFIC DISCIPLINARY SECTOR
ING-IND/01
LANGUAGE
Italian (English on demand)
TEACHING LOCATION
GENOVA (Naval Architecture and Marine Engineering)
semester
2° Semester
Teaching materials

OVERVIEW

Computational Fluid Dynamics (CFD) is becoming more and more attractive in the marne indusstry, as a complementary tool to usual model and full scale measurements. A deep knowledge of the theoretical basis of each approach, their limitations, the applicability fields and the quality of the results is, consequently, fundamentaal for the successfull application of these approaches to design and analysis problems

## AIMS AND CONTENT

LEARNING OUTCOMES

LEARNING OUTCOMES:

Introduction to the latest approaches (theoretical basis and numerical implementations) for the numerical solution of the typical problems related to the Naval Architecture (propulsion, hull resistance, cavitation). Development of simple numerical tools and application of high-fidelity solvers (RANSE) in order to identify their applicability to design problems, possible limitations and fields of applicability.

AIM of the COURSE:

The aim of the course is to provide a theoretical and practical knowledge of the principal aspects related to the application of numerical techniques to hydrodynamic (and in particular to Naval Architecture) in order to:

• Have an overview of the most important approaches (and of their limitations), like BEM and RANSE, for the solution of problems of interest in Naval Architecture (Propeller performance, Free surafce flows, Hull resistance), with a brief introduction on their fundamental equations and the most suitable discretization strategies;
• Understand the application limits of the available numerical approaches and critically be able to discuss them;

By:

• Development of simple numerical codes based on the potential flow theories illustrated during the course (2D potential flow solvers for thin profile theory, BEM using Hess&Smith for hydrofoil, 3D lifting line) using Matlab (or C++, FORTRAN, depending on the experience of the students);
• Training with StarCCM+ for the solution of the viscous flow using the RANSE approximation of the continuity and momentum equations around geometries of interest (simple 2D problems, like hydrofoils, 3D wings and rudders, Propellers, multiphase fluids)

CONTENT:

• Brief overview of Fluid Mechanics Equations;
• Potential flow approaches, theoretical basis and numerical implementation using Matlab, or FORTRAN or C++ of:
• Thin profile theory
• 3D Lifting line
• 3D Lifting Surface
• BEM usig Hess & Smith for 2d Hydrofoils
• RANSE approaches, including the relevant theory, discretization apporaches, meshes, single and multiphase problems by training with StarCCM+ for the solution of:
• von Karman Vortexes;
• Mesh motions
• Free Surface Flows (2D roll motion, free fall of a wedge on a free surface, hydrofoil under the free surface)
• 3D wings and rudders, tip vortex

AIMS AND LEARNING OUTCOMES

The aim of the course is to provide a theoretical and practical knowledge of the principal aspects related to the application of numerical techniques to hydrodynamic (and in particular to Naval Architecture) in order to:

• Have an overview of the most important approaches (and of their limitations), like BEM and RANSE, for the solution of problems of interest in Naval Architecture (Propeller performance, Free surafce flows, Hull resistance), with a brief introduction on their fundamental equations and the most suitable discretization strategies;
• Understand the application limits of the available numerical approaches and critically be able to discuss them;

By:

• Development of simple numerical codes based on the potential flow theories illustrated during the course (2D potential flow solvers for thin profile theory, BEM using Hess&Smith for hydrofoil, 3D lifting line) using Matlab (or C++, FORTRAN, depending on the experience of the students);
• Training with StarCCM+ for the solution of the viscous flow using the RANSE approximation of the continuity and momentum equations around geometries of interest (simple 2D problems, like hydrofoils, 3D wings and rudders, Propellers, multiphase fluids)

Teaching methods

Oral lessons and computer lab.

SYLLABUS/CONTENT

• Brief overview of Fluid Mechanics Equations;
• Potential flow approaches, theoretical basis and numerical implementation using Matlab, or FORTRAN or C++ of:
• Thin profile theory
• 3D Lifting line
• 3D Lifting Surface
• BEM usig Hess & Smith for 2d Hydrofoils
• RANSE approaches, including the relevant theory, discretization apporaches, meshes, single and multiphase problems by training with StarCCM+ for the solution of:
• von Karman Vortexes;
• Mesh motions
• Free Surface Flows (2D roll motion, free fall of a wedge on a free surface, hydrofoil under the free surface)
• 3D wings and rudders, tip vortex

J. Katz & A. Plotkin, "Low Speed Aerodynamics - From wing theory to panel method", McGraw-Hill

J.H. Ferziger & M. Peric, "Computational Methods for Fluid Dynamics", Springer

## TEACHERS AND EXAM BOARD

Ricevimento: by appointment: email: stefano.gaggero@unige.it phone: 010 353 2389

Exam Board

STEFANO GAGGERO (President)

DIEGO VILLA

GIULIANO VERNENGO

## LESSONS

Teaching methods

Oral lessons and computer lab.

ORARI

L'orario di tutti gli insegnamenti è consultabile su EasyAcademy.

Vedi anche:

SHIP NUMERICALHYDRODYNAMICS

## EXAMS

Exam description

Oral talk with presentation of the results of a home assignment

Assessment methods

Presentation of results and critical discussion of the outcommes of the home assigments. Identification of applicability fields, possible different formulation of the problem, limitations and field of applicability of the developed numerical approach.

Exam schedule

Date Time Location Type Notes
03/03/2020 09:00 GENOVA Esame su appuntamento
09/06/2020 09:00 GENOVA Esame su appuntamento
07/07/2020 09:00 GENOVA Esame su appuntamento
08/09/2020 09:00 GENOVA Esame su appuntamento