"How to calculate moments of two ships in motion conditions?"

Islam Sherif · May 23, 2023, 01:14

Hello everyone,

I am currently working on applying motion to two self-propulsion ships sailing in water. I have used DFBI (Dynamic Fluid Body Interaction) as the motion model and translation and rotation as the reference frames for both the motion and propeller rotation. However, I have encountered an issue when attempting to calculate the moment for each ship in STAR-CCM+ as it gives me an error when I try to set up the moment report. note that I have not considered the current and wind speed in the Volume of Fluid (VOF) simulation as the two ships have different speeds.

I would greatly appreciate any assistance or guidance on how to calculate the moment for each ship in this scenario. Thank you in advance.

Aeronautics El. K. · May 26, 2023, 06:54

How many bodies do you have in the DFBI definition?

Islam Sherif · May 26, 2023, 09:06

I have two bodies in motion condition

Islam Sherif · May 26, 2023, 09:08

I need first to applay DFBI in both but I couldn't

May 23, 2023, 01:14	"How to calculate moments of two ships in motion conditions?"	#1
Islam Sherif New Member Islam Sherif Join Date: May 2023 Posts: 4 Rep Power: 2	Hello everyone, I am currently working on applying motion to two self-propulsion ships sailing in water. I have used DFBI (Dynamic Fluid Body Interaction) as the motion model and translation and rotation as the reference frames for both the motion and propeller rotation. However, I have encountered an issue when attempting to calculate the moment for each ship in STAR-CCM+ as it gives me an error when I try to set up the moment report. note that I have not considered the current and wind speed in the Volume of Fluid (VOF) simulation as the two ships have different speeds. I would greatly appreciate any assistance or guidance on how to calculate the moment for each ship in this scenario. Thank you in advance.

May 26, 2023, 06:54		#2
Aeronautics El. K. Senior Member Lefteris Join Date: Oct 2011 Location: UK Posts: 337 Rep Power: 15	How many bodies do you have in the DFBI definition? Islam Sherif likes this. __________________ Lefteris

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May 26, 2023, 09:06		#3
Islam Sherif New Member Islam Sherif Join Date: May 2023 Posts: 4 Rep Power: 2	I have two bodies in motion condition

May 26, 2023, 09:08		#4
Islam Sherif New Member Islam Sherif Join Date: May 2023 Posts: 4 Rep Power: 2	I need first to applay DFBI in both but I couldn't