Applying an external force to a moving object

GeZi · September 11, 2023, 00:32

Hi, REEF3D team
Thanks to your software. During the process of using, I have a question, it seems that the X option can only add the gravity of the moving object. If I want to apply an external concentrated force or uniformly distributed load on the moving object, can it be achieved?

kamath · September 11, 2023, 02:03

check out X 210/ X 211 / X 221. These provide external forcing on a floating body

GeZi · September 11, 2023, 03:26

Thank you for your reply, Professor Kamath. However, it seems that X210 and X211 describe the three linear velocities and three angular velocities of object motion. What I want to achieve is to apply a concentrated force to a certain point of an object, including the position of the point and the magnitude and direction of the force. Can this be achieved? If possible, could you provide a concise description?

Additionally, what do the six inputs in X211 represent? What is the meaning of column S in the file?

GeZi · September 11, 2023, 03:28

Quote:

Originally Posted by kamath

check out X 210/ X 211 / X 221. These provide external forcing on a floating body

Thank you for your reply, Professor Kamath. However, it seems that X210 and X211 describe the three linear velocities and three angular velocities of object motion. What I want to achieve is to apply a concentrated force to a certain point of an object, including the position of the point and the magnitude and direction of the force. Can this be achieved? If possible, could you provide a concise description?

Additionally, what do the six inputs in X211 represent? What is the meaning of column S in the file?

valgrinda · September 11, 2023, 04:30

What type of situation are you thinking of?

Right now it is not implemented, but it should be possible to do that.

GeZi · September 11, 2023, 04:36

Quote:

Originally Posted by valgrinda

What type of situation are you thinking of?

Right now it is not implemented, but it should be possible to do that.

I am trying to simulate the movement of an object with external concentrated forces and bending moments when scour leads to insufficient burial depth.Is it impossible for external concentrated forces and bending moments to be applied to the object?

valgrinda · September 12, 2023, 07:44

It sounds to me a bit too complex for the current sediment algorithm.....

September 11, 2023, 00:32	Applying an external force to a moving object	#1
GeZi New Member GeZi Join Date: Jul 2023 Posts: 23 Rep Power: 3	Hi, REEF3D team Thanks to your software. During the process of using, I have a question, it seems that the X option can only add the gravity of the moving object. If I want to apply an external concentrated force or uniformly distributed load on the moving object, can it be achieved?

September 11, 2023, 02:03		#2
kamath Senior Member Arun Kamath Join Date: Nov 2014 Location: Trondheim, Norway Posts: 265 Rep Power: 14	check out X 210/ X 211 / X 221. These provide external forcing on a floating body __________________ Arun X years with REEF3D

September 11, 2023, 04:30		#5
valgrinda Super Moderator Hans Bihs Join Date: Jun 2009 Location: Trondheim, Norway Posts: 403 Rep Power: 19	What type of situation are you thinking of? Right now it is not implemented, but it should be possible to do that. __________________ Hans Bihs Team REEF3D www.reef3d.com

September 12, 2023, 07:44		#7
valgrinda Super Moderator Hans Bihs Join Date: Jun 2009 Location: Trondheim, Norway Posts: 403 Rep Power: 19	It sounds to me a bit too complex for the current sediment algorithm..... __________________ Hans Bihs Team REEF3D www.reef3d.com

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
ActuatorDiskExplicitForce in OF2.1. Help	be_inspired	OpenFOAM Programming & Development	10	September 14, 2018 12:12
Object moving in a channel or tube with stationery air	jiahui_93	Main CFD Forum	2	January 8, 2018 21:13
Applying drag force in the fluid model	CanadaFlanker	CFX	7	May 6, 2014 00:13
How to add external time varying force	achyutan	OpenFOAM Running, Solving & CFD	0	January 8, 2014 08:57
Applying a moment to an object	daveatstyacht	OpenFOAM	0	July 27, 2010 05:35

September 11, 2023, 03:26		#3
GeZi New Member GeZi Join Date: Jul 2023 Posts: 23 Rep Power: 3	Thank you for your reply, Professor Kamath. However, it seems that X210 and X211 describe the three linear velocities and three angular velocities of object motion. What I want to achieve is to apply a concentrated force to a certain point of an object, including the position of the point and the magnitude and direction of the force. Can this be achieved? If possible, could you provide a concise description? Additionally, what do the six inputs in X211 represent? What is the meaning of column S in the file?