Test Case 1.2

DTMB5415 [Geometry]

Conditions

• Towing condition in still water
• Fixed (Sinkage FP = -0.0028Lpp, AP=-0.0009Lpp)
• Without rudder

Froude number ( Fn )	Reynolds number ( Rn )
0.28	1.26×107

Items and Remarks

Figure Number	Items	Remarks
	Integral variables: Coefficients of    total resistance (CT), split into    pressure (CP) and    friction (CF) components and Uncertainty analysis( USN, UV, E )	Experimental results are available Table UD = 2.20 [%CT]
Fig. 1.2-1	Wave profile on the hull	To be compared with the experimental results download (The above experimental result was transformed in the earth-fixed coordinate on Jan/13,2005.)
Fig. 1.2-2	Uncertainty analysis of the above item	UD = 6.40 [% ζ range], ζ range = 0.02
Fig. 1.2-3	Longitudinal wave cut at y/Lpp=0.172	To be compared with the experimental results download
Fig. 1.2-4	Uncertainty analysis of the above item	UD = 4.70 [% ζ range], ζ range = 0.01
Fig. 1.2-5	Wave-elevation contours ( global wave field )
Fig. 1.2-6	Wave-elevation contours ( bow wave field )
Fig. 1.2-7	Wave-elevation contours ( stern wave field )
Fig. 1.2-8	Axial velocity contours and cross flow vectors on the propeller plane (x/Lpp=0.435)
Fig. 1.2-9	Velocity downstream of the propeller plane (x/Lpp=0.435) at z/Lpp=-0.02	To be compared with the experimental results download
Fig. 1.2-10	Uncertainty analysis of the above item	UD = 5.3, 7.2, 16.8 % for u, v, w [%U] along the entire cut (Assumed Value )
Fig. 1.2-11	Hull surface pressure contours (port side view )

• Coordinate system for comparisons is fixed to midship on the undisturbed waterplane.
• All quantities are non-dimensionalized by density of water ( $\rho$ ), ship speed ( $U$ ), and length between perpendiculars ( $L_{PP}$ ):

  $$F_n = \dfrac{U}{\sqrt{g \cdot L_{PP}}}, \quad R_n = \dfrac{U \cdot L_{PP}}{\nu}$$

  
  
  where $g$ is the gravitational acceleration and $\nu$ is the kinematic viscosity.
• All CFD predicted force coefficients should be reported using the provided ( Geometry page ) wetted surface area at rest ( $S_{0}$ ). Force coefficients are defined as follows:

  $$C_{T} = \dfrac{R_{T}}{\frac{1}{2} \rho U^2 S_{0}}, \quad C_{F} = \dfra... ...1}{2} \rho U^2 S_{0}}, \quad C_{P} = \dfrac{R_{P}}{\frac{1}{2} \rho U^2 S_{0}}$$