Drag Force from Cable: Calculate & Understand

AI Thread Summary
To calculate the drag force on a neutrally buoyant cable moving through water, one can use the drag equation, which factors in the cable's diameter, length, and the flow velocity of the water. The provided link offers a resource for understanding drag on cylindrical objects, which is relevant for the cable's shape. Key variables include the drag coefficient, fluid density, and cross-sectional area of the cable. It's important to consider the cable's buoyancy and how it affects its interaction with the water. Accurate calculations will help in assessing the overall performance of the raft system.
Chee Lin
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Hi,

I have a raft that move along in a tunnel with the water flow (no propelling engine). A neutrally bouyant cable is attached to the device at the back to supply power for the apparatus on the raft. The cable is about 14mm in diameter and the max length of cable can be 5km. May I ask how can I calculate the drag force caused by the cable?
 
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