A FAST METHOD OF EVALUATION FOR THE TRANSLATING AND PULSATING GREEN'S FUNCTION

The computation of the unsteady (harmonic) Green's function with forward speed involves numerical difficulties and requires a high computational time. A new fast and precise method of calculation is presented, valid regardless of the values for frequency and forward speed. The integrations over the complex exponential integral use a Runge-Kutta fourth order scheme with a stepsize control. Calculations are compared with other methods, and the linearized free surface boundary condition is satisfied with good accuracy. Examples of free surface elevations above a submerged pulsating and translating source are presented.

• Supplemental Notes:
  • Ship Technology Res, v 42 n 2, April 1995, p 68 [13 p, 19 ref, 1 tab, 7 fig]
• Authors:
  • Ba, M
  • Guilbaud, M
• Publication Date: 1995

Language

• English

Subject/Index Terms

• TRT Terms: Fluid dynamics; Free surface; Green's function; Seakeeping
• Old TRIS Terms: Forward speed
• Subject Areas: Marine Transportation;

Filing Info

• Accession Number: 00710945
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM