Vessel Draft given Form Drag of Vessel Calculator

✖Form Drag of a Vessel [Force] is increase in resistance due to pressure.ⓘ Form Drag of a Vessel [F_{c, form}]			+10% -10%
✖Water Density is mass per unit of water.ⓘ Water Density [ρ_water]			+10% -10%
✖Form Drag Coefficient [dimensionless] is the drag caused by the separation of the boundary layer from a surface and the wake created by that separation.ⓘ Form Drag Coefficient [C_{c, form}]			+10% -10%
✖Vessel Beam [length] is the widest part of the vessel.ⓘ Vessel Beam [B]			+10% -10%
✖Average Current Speed [length/time] defined as the speed of Ocean currents that are continuous, predictable, directional movement of seawater.ⓘ Average Current Speed [V_c]			+10% -10%
✖Angle of the Current Relative to the Longitudinal Axis of the Vessel.ⓘ Angle of the Current [θ_c]			+10% -10%

✖Vessel Draft [length] of a ship's hull is the vertical distance between the waterline and the bottom of the hull.ⓘ Vessel Draft given Form Drag of Vessel [T]

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Formula

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Vessel Draft given Form Drag of Vessel

Formula

`"T" = "F"_{"c, form"}/(-0.5*"ρ"_{"water"}*"C"_{"c, form"}*"B"*"V"_{"c"}^2*cos("θ"_{"c"}))`

Example

`"-121951.942163m"="12kN"/(-0.5*"1000kg/m³"*"5"*"2m"*("25m/h")^2*cos("20"))`

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Vessel Draft given Form Drag of Vessel Solution

STEP 0: Pre-Calculation Summary

Formula Used

Vessel Draft = Form Drag of a Vessel/(-0.5*Water Density*Form Drag Coefficient*Vessel Beam*Average Current Speed^2*cos(Angle of the Current))
T = F_{c, form}/(-0.5*ρ_water*C_{c, form}*B*V_c^2*cos(θ_c))
This formula uses 1 Functions, 7 Variables

Functions Used

cos - Cosine of an angle is the ratio of the side adjacent to the angle to the hypotenuse of the triangle., cos(Angle)

Variables Used

Vessel Draft - (Measured in Meter) - Vessel Draft [length] of a ship's hull is the vertical distance between the waterline and the bottom of the hull.
Form Drag of a Vessel - (Measured in Newton) - Form Drag of a Vessel [Force] is increase in resistance due to pressure.
Water Density - (Measured in Kilogram per Cubic Meter) - Water Density is mass per unit of water.
Form Drag Coefficient - Form Drag Coefficient [dimensionless] is the drag caused by the separation of the boundary layer from a surface and the wake created by that separation.
Vessel Beam - (Measured in Meter) - Vessel Beam [length] is the widest part of the vessel.
Average Current Speed - (Measured in Meter per Second) - Average Current Speed [length/time] defined as the speed of Ocean currents that are continuous, predictable, directional movement of seawater.
Angle of the Current - Angle of the Current Relative to the Longitudinal Axis of the Vessel.

STEP 1: Convert Input(s) to Base Unit

Form Drag of a Vessel: 12 Kilonewton --> 12000 Newton (Check conversion here)
Water Density: 1000 Kilogram per Cubic Meter --> 1000 Kilogram per Cubic Meter No Conversion Required
Form Drag Coefficient: 5 --> No Conversion Required
Vessel Beam: 2 Meter --> 2 Meter No Conversion Required
Average Current Speed: 25 Meter per Hour --> 0.00694444444444444 Meter per Second (Check conversion here)
Angle of the Current: 20 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

T = F_{c, form}/(-0.5*ρ_water*C_{c, form}*B*V_c^2*cos(θ_c)) --> 12000/(-0.5*1000*5*2*0.00694444444444444^2*cos(20))

Evaluating ... ...

T = -121951.94216294

STEP 3: Convert Result to Output's Unit

-121951.94216294 Meter --> No Conversion Required

FINAL ANSWER

-121951.94216294 ≈ -121951.942163 Meter <-- Vessel Draft

(Calculation completed in 00.004 seconds)

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Home » Engineering » Civil » Coastal and Ocean Engineering » Surf Zone Hydrodynamics » Harbor Hydrodynamics » Mooring » Mooring Forces » Form Drag » Vessel Draft given Form Drag of Vessel

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< 7 Form Drag Calculators

Average Current Speed for Form Drag of Vessel

Go Longshore Current Speed = -sqrt(Form Drag of a Vessel/0.5*Water Density*Form Drag Coefficient*Vessel Beam*Vessel Draft*cos(Angle of the Current))

Angle of Current Relative to Longitudinal Axis of Vessel for Form Drag of Vessel

Go Angle of the Current = acos(-Form Drag of a Vessel/(0.5*Water Density*Form Drag Coefficient*Vessel Beam*Vessel Draft*Average Current Speed^2))

Form Drag Coefficient given Form Drag of Vessel

Go Form Drag Coefficient = -Form Drag of a Vessel/(0.5*Water Density*Vessel Beam*Vessel Draft*Average Current Speed^2*cos(Angle of the Current))

Vessel Draft given Form Drag of Vessel

Go Vessel Draft = Form Drag of a Vessel/(-0.5*Water Density*Form Drag Coefficient*Vessel Beam*Average Current Speed^2*cos(Angle of the Current))

Vessel Beam given Form Drag of Vessel

Go Vessel Beam = -Form Drag of a Vessel/(0.5*Water Density*Form Drag Coefficient*Vessel Draft*Average Current Speed^2*cos(Angle of the Current))

Form Drag of Vessel due to Flow of Water Past Vessel's Cross-sectional Area

Go Form Drag of a Vessel = -0.5*Water Density*Form Drag Coefficient*Vessel Beam*Vessel Draft*Average Current Speed^2*cos(Angle of the Current)

Form Drag of Vessel given Total Longitudinal Current Load on Vessel

Go Form Drag of a Vessel = Total Longitudinal Current Load on a Vessel-Skin Friction of a Vessel-Vessel Propeller Drag

Vessel Draft given Form Drag of Vessel Formula

What is Mooring in Shipping?

Mooring is a procedure to anchor the ship to a fixed or floating element and keep it connected during loading or unloading operations. Safe mooring must withstand several forces, such as wind, the current, the tide and waves.

What is form drag?

Form drag is the portion of the resisting force encountered by a body moving through a fluid that is due to the irregularity of shape of the body, reducible to a minimum by streamlining.

How to Calculate Vessel Draft given Form Drag of Vessel?

Vessel Draft given Form Drag of Vessel calculator uses Vessel Draft = Form Drag of a Vessel/(-0.5*Water Density*Form Drag Coefficient*Vessel Beam*Average Current Speed^2*cos(Angle of the Current)) to calculate the Vessel Draft, Vessel draft given form drag of vessel influencing Longitudinal current loads on ships are taken from procedures by NAVFAC Design Manual DM26.5. Vessel Draft is denoted by T symbol.

How to calculate Vessel Draft given Form Drag of Vessel using this online calculator? To use this online calculator for Vessel Draft given Form Drag of Vessel, enter Form Drag of a Vessel (F_{c, form}), Water Density (ρ_water), Form Drag Coefficient (C_{c, form}), Vessel Beam (B), Average Current Speed (V_c) & Angle of the Current (θ_c) and hit the calculate button. Here is how the Vessel Draft given Form Drag of Vessel calculation can be explained with given input values -> -121951.942163 = 12000/(-0.5*1000*5*2*0.00694444444444444^2*cos(20)).

FAQ

What is Vessel Draft given Form Drag of Vessel?

Vessel draft given form drag of vessel influencing Longitudinal current loads on ships are taken from procedures by NAVFAC Design Manual DM26.5 and is represented as T = F_{c, form}/(-0.5*ρ_water*C_{c, form}*B*V_c^2*cos(θ_c)) or Vessel Draft = Form Drag of a Vessel/(-0.5*Water Density*Form Drag Coefficient*Vessel Beam*Average Current Speed^2*cos(Angle of the Current)). Form Drag of a Vessel [Force] is increase in resistance due to pressure, Water Density is mass per unit of water, Form Drag Coefficient [dimensionless] is the drag caused by the separation of the boundary layer from a surface and the wake created by that separation, Vessel Beam [length] is the widest part of the vessel, Average Current Speed [length/time] defined as the speed of Ocean currents that are continuous, predictable, directional movement of seawater & Angle of the Current Relative to the Longitudinal Axis of the Vessel.

How to calculate Vessel Draft given Form Drag of Vessel?

Vessel draft given form drag of vessel influencing Longitudinal current loads on ships are taken from procedures by NAVFAC Design Manual DM26.5 is calculated using Vessel Draft = Form Drag of a Vessel/(-0.5*Water Density*Form Drag Coefficient*Vessel Beam*Average Current Speed^2*cos(Angle of the Current)). To calculate Vessel Draft given Form Drag of Vessel, you need Form Drag of a Vessel (F_{c, form}), Water Density (ρ_water), Form Drag Coefficient (C_{c, form}), Vessel Beam (B), Average Current Speed (V_c) & Angle of the Current (θ_c). With our tool, you need to enter the respective value for Form Drag of a Vessel, Water Density, Form Drag Coefficient, Vessel Beam, Average Current Speed & Angle of the Current and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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