Added Mass

Grigor Nikolov · April 9, 2014, 08:30

A simply question
is added mass used by Ansys Fluuent in 6DOF model differential equations

gfoam · April 9, 2014, 18:05

Can you clarify your question?

Grigor Nikolov · April 10, 2014, 02:58

Displacement of floating structure has to be measured that is product of vortex induced motions. The unit has 3 degrees of freedom sway surge and yaw.
Model of turbulence is k-omega SST.
So the question is does the calculation include added mass or not

gfoam · April 10, 2014, 10:07

Please take a look at this thesis. The answer is yes, because the added mas is a consequense of solving the equation of motion of a body inmersed in a fluid and that is what the 6DOF model does. But you have to calculate the added mass through a propper method, I mean the model 6DOF solves the equation of motion of the body but if you want to know the added mass you have to calculate this. I hope this helps you. Regards. Gonzalo

Grigor Nikolov · April 10, 2014, 13:38

tnx for answer
p.s link doesnt work

April 9, 2014, 08:30	Added Mass	#1
Grigor Nikolov Member Grigor Nikolov Join Date: Dec 2012 Posts: 36 Rep Power: 13	A simply question is added mass used by Ansys Fluuent in 6DOF model differential equations

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April 9, 2014, 18:05		#2
gfoam Senior Member Gonzalo Join Date: Mar 2011 Location: Argentina Posts: 122 Rep Power: 16	Can you clarify your question?

April 10, 2014, 02:58		#3
Grigor Nikolov Member Grigor Nikolov Join Date: Dec 2012 Posts: 36 Rep Power: 13	Displacement of floating structure has to be measured that is product of vortex induced motions. The unit has 3 degrees of freedom sway surge and yaw. Model of turbulence is k-omega SST. So the question is does the calculation include added mass or not

April 10, 2014, 10:07		#4
gfoam Senior Member Gonzalo Join Date: Mar 2011 Location: Argentina Posts: 122 Rep Power: 16	Please take a look at this thesis. The answer is yes, because the added mas is a consequense of solving the equation of motion of a body inmersed in a fluid and that is what the 6DOF model does. But you have to calculate the added mass through a propper method, I mean the model 6DOF solves the equation of motion of the body but if you want to know the added mass you have to calculate this. I hope this helps you. Regards. Gonzalo

April 10, 2014, 13:38		#5
Grigor Nikolov Member Grigor Nikolov Join Date: Dec 2012 Posts: 36 Rep Power: 13	tnx for answer p.s link doesnt work