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| 1 | Numerical Simulation of Line Puff Via RNGK-ep Mode显示文摘NumericalSimulationofLinePuffViaRNGK-epModel11ThepaperwasreceivedonOct.24,1996J.H.W.LEE&G.Q.CHEN(DepartmentofCivilEngineerin... | J.H.W.LEE G.Q.CHEN | 1996 | Communications in Nonlinear Science and Numerical Simulation1996，1，4： | 3 |
| 2 | Numerical Experiment on Two-Dimensional Line Thermal显示文摘The time evolution of a two-dimensional line thermal-a turbulent flow produced by an initial element with signifi-cant buoyancy released in a large water body, is numerically studied with the two-equation k - s model for turbulenceclosure. The numerical results show that the thermal is characterized by a vortex pair flow and a kidney shaped concentra-tion structure with double peak maxima; the computed flow details and scalar mixing characteristics can be described byself-similar relations beyond a dimensionless time around 10. There are two regions in the flow field of a line thermal: amixing region where the concentration of tracer fluid is high and the flow is turbulent and rotational with a pair of vortexeyes, and an ambient region where the concentration is zero and the flow is potential and well-described by a model ofdoublet with strength very close to those given by early experimental and analytical studies. The added virtual mass coeffi-cient of the thermal motion is found to be approximately 1. The aspect ratio for the kidney-shaped sectional thermal isfound to be around 1.45 for the self-similar phase. The predicted thermal spreading and mixing rate compares well withexperimental data. | J.H.W.LEE 陈国谦 | 2002 | China Ocean Engineering2002，17，4： | 0 |
| 3 | Turbulent Gravity Current of Lock Release Type: A Numerical Study显示文摘The time evolution of a turbulent gravity current of lock release type, formed by a finite volume of homogenous fluid released instantaneously into another fluid of slightly lower density, is studied numerically via the renormalization group (RNG) k - model for Reynolds-stress closure to characterize the flow with transitional and highly localized turbulence. Consistent with previous experimental observations the numerical results show that the gravity current passes through two distinct phases, an initial slumping phase in which the current head advances steadily, and a second self-similar phase in which the front velocity decreases like the negative third power of the time after release. An overall entrainment ratio proportional to the distance from the release point is found and compares well with available experimental data for the slumping phase. | G.Q.CHEN J.H.W.LEE | 1999 | Communications in Nonlinear Science and Numerical Simulation1999，4，1： | 0 |
| 4 | Asymptotic Similarity of AxisymmetricThermal显示文摘IntroductionThethermal,abodyofbuoyalfluidinafluidwithwhichitcanmixandgivennamebygliderpilotstothosemassesofwarmairrisingfromhotgroundwarmedbysunshineinwhichtheycansoar,isrecognizedasoneofthefundamelltalphenomenainenvironmentalfluid.e.hanicsli],duetoi... | GuoqianCHEN J.H.W.LEE | 1999 | Communications in Nonlinear Science and Numerical Simulation1999，4，3： | 0 |
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