Results 271 to 280 of about 376,641 (309)

Quark model of nucleons and three-body forces

Physical Review C, 1984
Resonating group kernels for the nine-quark NNN system are used to show that the quark structure of nucleons leads to nonlocal three-body forces which are short ranged and attractive. They give a net contribution of 0.2 MeV to the three-nucleon binding energy, 0.9 MeV via quark-quark interaction terms whose effect is partially canceled by kinetic ...
Y. Suzuki, K. T. Hecht
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Folding model with three-body force

Journal of Physics G: Nuclear and Particle Physics, 1994
A folding model for the nucleon-nucleus interaction potential involving a three-body force is presented. Well known models for the nuclear two-body density have been used to derive, under the zero-range approximation, an expression for the two-body effective interaction which includes the three-body force contribution as an additional density ...
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Modeling magnetic torque and force for controlled manipulation of soft-magnetic bodies

2007 IEEE/ASME international conference on advanced intelligent mechatronics, 2007
We calculate the torque and force generated by an arbitrary magnetic field on an axially symmetric soft-magnetic body. We consider the magnetization of the body as a function of the applied field, using a continuous model that unifies two disparate magnetic models. The continuous torque and force follow.
Jake J. Abbott, Olgaç Ergeneman, Michael P. Kummer, Ann M. Hirt, Bradley J. Nelson   +4 more
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Body Force Propeller Model for Unsteady Surge Motion

Volume 2: CFD and FSI, 2018
Accurately modelling a self-propelled vessel in a large amplitude seaway with CFD is very expensive and practically out of reach. The expense is due to the very small numerical time-step required for the propeller rotation and the large mesh size. A method for accurately modelling a propeller while reducing computational cost is desirable.
Bradford G. Knight, Kevin J. Maki
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Novel Approach for Modeling Separation Forces Between Deformable Bodies

IEEE Transactions on Information Technology in Biomedicine, 2006
Many minimally invasive surgeries (MISs) involve removing whole organs or tumors that are connected to other organs. Development of haptic simulators that reproduce separation forces between organs can help surgeons learn MIS procedures. Powerful computational approaches such as finite-element methods generally cannot simulate separation in real time ...
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Body Force Model for the Aerodynamics of Inclined Perforated Surfaces

AIAA Journal, 2012
This is a joint experimental and computational research effort on the aerodynamics of perforated surfaces inclined to a freestream. The goal is to characterize the key parameters affecting the flowfield in order to construct a macroscopic computational model that obviates resolution of the detailed perforations.
Juntao Xiong, Andrew Johnson, Feng Liu, Dimitri Papamoschou   +3 more
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Three-body forces in nuclei and the σ-model

Nuclear Physics A, 1977
Abstract The expectation value of the three-σ-exchange three-body force is evaluated in nuclear matter and in the triton. Full correlations are included between all three particles, and exchange terms are evaluated. When the parameters of the σ-model are chosen to reproduce the medium-range attraction in the two-nucleon system, one obtains some −15 ...
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Three body force model for lattice dynamics of copper

Solid State Communications, 1986
Abstract Phonon frequencies of copper are calculated in both symmetry and certain off-symmetry directions using a five parameter three body force model. The validity of the model is shown by a direct comparison with the recent measurements of the off-symmetry phonon frequencies.
H. Nait-Laziz, K.K. Chopra
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Turbulence modeling using body force potentials

Physics of Fluids, 1999
Reynolds averaged Navier–Stokes (RANS) turbulence models are usually concerned with modeling the Reynolds stress tensor. An alternative approach to RANS turbulence modeling is described where the primary modeled quantities are the scalar and vector potentials of the turbulent body force—the divergence of the Reynolds stress tensor.
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Three-body force shell model — An application to CaO

Solid State Communications, 1972
Abstract A three-body force shell model has been applied to compute the dispersion of phonons in calcium oxide along principal symmetry directions. The results show much better agreement with the measured phonon dispersion data as compared to the other variations of the shell model.
K.S. Upadhyaya, R.K. Singh
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