SIMULATION OF INCOMPRESSIBLE FLOWS ACROSS MOVING BODIES USING MESHLESS FINITE DIFFRERENCING

2003 ◽  
Author(s):  
C. S. CHEW ◽  
K. S. YEO ◽  
C. SHU
Keyword(s):  
Incompressible Flows ◽  
Moving Bodies

A Sharp-Interface Immersed Boundary Method for Simulating Incompressible Flows with Arbitrarily Deforming Smooth Boundaries

2017 ◽  
Vol 15 (01) ◽  
pp. 1750080 ◽  
Author(s):  
Zuo Cui ◽  
Zixuan Yang ◽  
Hong-Zhou Jiang ◽  
Wei-Xi Huang ◽  
Lian Shen
Keyword(s):  
Incompressible Flows ◽  
Deformable Body ◽  
Fluid Flows ◽  
Sharp Interface ◽  
Immersed Boundary ◽  
Time Step ◽  
Fluid Forces ◽  
Solid Bodies ◽  
Ib Method ◽  
Moving Bodies

We develop a sharp interface immersed boundary (IB) method to simulate the interactions between fluid flows and deformable moving bodies. Fluid–solid interfaces are captured using a level-set (LS) function, which is updated at every time step by a reinitialization procedure. Motions of solid bodies are dynamically coupled with fluid flows by calculating the fluid forces exerted on solid bodies. The accuracy and robustness of the LS-based IB method are tested systematically in the context of several benchmark cases and self-propelled fish swimming. The effects of computational parameters on the accuracy of deformable body capturing are analyzed. It is found that the algorithm performs well in simulating the flow motions surrounding the deforming and moving bodies.

Dynamics of comets in the collapsing protosolar nebula

1999 ◽  
Vol 173 ◽  
pp. 45-50
Author(s):  
L. Neslušan
Keyword(s):  
Solar System ◽  
Velocity Distribution ◽  
Oort Cloud ◽  
Interstellar Clouds ◽  
Protosolar Nebula ◽  
Moving Bodies

AbstractComets are created in the cool, dense regions of interstellar clouds. These macroscopic bodies take place in the collapse of protostar cloud as mechanically moving bodies in contrast to the gas and miscroscopic dust holding the laws of hydrodynamics. In the presented contribution, there is given an evidence concerning the Solar system comets: if the velocity distribution of comets before the collapse was similar to that in the Oort cloud at the present, then the comets remained at large cloud-centric distances. Hence, the comets in the solar Oort cloud represent a relict of the nebular stage of the Solar system.

Numerical solution of the reduced Navier-Stokes equations for internal incompressible flows

AIAA Journal ◽  
2000 ◽  
Vol 38 ◽  
pp. 1603-1614
Author(s):  
Martin Scholtysik ◽  
Bernhard Mueller ◽  
Torstein K. Fannelop
Keyword(s):  
Numerical Solution ◽  
Incompressible Flows ◽  
Stokes Equations ◽  
Navier Stokes ◽  
Navier Stokes Equations

Momentum variable procedure for solving compressible and incompressible flows

AIAA Journal ◽  
1997 ◽  
Vol 35 ◽  
pp. 1801-1805
Author(s):  
M. Darbandi ◽  
G. E. Schneider
Keyword(s):  
Incompressible Flows ◽  
Momentum Variable
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