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285
An embedded bottom boundary layer formulation for zcoordinate ocean models
 J. Ocean Atmos. Tech
, 2000
"... An embedded bottom boundary layer (EBBL) scheme is developed to improve the bottom topographic representation in zcoordinate ocean general circulation models. The EBBL scheme is based on the combined techniques of an embedded topographyfollowing slab (Beckmann and Doscher 1997; Gnanadesikan et al. ..."
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. 1998), an explicit turbulent bottom boundary layer (BBL) (Killworth and Edwards 1998), and a generalized pressure gradient formulation (Song 1998). The coupling between the interior zlevel model and the EBBL model is achieved by exchanging entrainment/detrainment and pressure gradients at the bottom
The gradient model load balancing method
 IEEE Trans. on Software Engineering
, 1987
"... AbstractA dynamic load balancing method is proposed for a class of largediameter multiprocessor systems. The method is based on the "gradient model, " which entails transferring backlogged tasks to nearby idle processors according to a pressure gradient indirectly established by request ..."
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Cited by 142 (1 self)
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AbstractA dynamic load balancing method is proposed for a class of largediameter multiprocessor systems. The method is based on the "gradient model, " which entails transferring backlogged tasks to nearby idle processors according to a pressure gradient indirectly es
Thermomechanical formulations of strain gradient plasticity for geomaterials
 J. Mech. Solids Struct
, 2006
"... Constitutive formulation of strain gradient plasticity for geomaterials via a thermomechanical approach is investigated in this paper. It is demonstrated that, by defining two thermodynamical potentials (a freeenergy function and a rate of dissipation function), the entire constitutive behavior of ..."
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appropriate thermodynamical functions, a wide variety of strain gradient plasticity models in the literature are recovered. Typical features associated with geomaterials, such as pressure and Lodeangle dependency, are addressed in detail. This paper provides a general thermodynamicallyconsistent framework
Finite element analysis of land subsidence above depleted reservoirs with pore pressure gradient and total stress formulations
"... SUMMARY The solution of the poroelastic equations for predicting land subsidence above productive gas/oil "elds may be addressed by the principle of virtual works using either the e!ective intergranular stress, with the pore pressure gradient regarded as a distributed body force, or the total ..."
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the average elementwise radius. A modi"cation to both formulations is suggested which allows to correctly solve the problem of a "nite reservoir with an in"nite pressure gradient, i.e. with a pore pressure discontinuity on its boundary.
Pressure Gradient Effects on Hypersonic Cavity Flow Heating
"... The effect of a pressure gradient on the local heating disturbance of rectangular cavities tested at hypersonic freestream conditions has been globally assessed using the twocolor phosphor thermography method. These experiments were conducted in the Langley 31Inch Mach 10 Tunnel and were initiated ..."
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that the presence of the pressure gradient did not alter the open cavity heating for laminarentry/laminarexit flows, but did raise the average floor heating for closed cavities. The results of these riskreduction studies will be used to formulate a heating assessment of potential damage scenarios occurring
pp. 341–349 PRESSURE STABILIZED FINITE ELEMENT FORMULATION FOR
"... Abstract. Local projection based stabilized finite element methods for the solution of Darcy flow offer several advantages as compared to mixed Galerkin methods. In particular, the avoidance of stability conditions between finite element spaces, the efficiency in solving the reduced linear algebraic ..."
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algebraic system, and the convenience of using equal order continuous approximations for all variables. In this paper we analyze the pressure gradient method for Darcy flow and investigate its stability and convergence properties. Key words. Stabilized finite elements, Darcy equations, convergence, error
An Implicit Viscosity Formulation for SPH Fluids
"... Figure 1: Interaction of a highly viscous fluid with complex moving solids. Up to 780k particles are used. The computation time is 30s per frame. We present a novel implicit formulation for highly viscous fluids simulated with Smoothed Particle Hydrodynamics SPH. Compared to explicit methods, our fo ..."
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that is introduced by the SPH pressure solver to counteract density deviations. The target gradient ensures that pressure and viscosity computation do not interfere. Therefore, only one pressure projection step is required, which is in contrast to stateoftheart implicit Eulerian formulations. While
Implicit Solutions of the Incompressible NavierStokes Equations Using the Pressure Gradient Method
"... A modified pressure gradient method is developed for solving the incompressible twoand threedimensional NavierStokes equations in primitive variables. Velocity and pressure gradient vectors, rather than the velocity and pressure, are considered as dependent variables. This choice of the dependent ..."
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includes a pressure gradient averaging term in the momentum equations to stabilize the solution. This term is extended here to general curvilinear coordinates. The system of equations is discritized using a conservative finite volume formulation. Time integration is achieved with a fully implicit scheme
Total Pressure Losses Minimization in Turbomachinery Cascades, using a New Continuous Adjoint Formulation
"... A new continuous adjoint formulation for the optimization of cascade airfoils with minimum total pressure losses, i.e. an objective function which has never been used before along with the continuous adjoint, is presented. To support a steepest descent algorithm, the adjoint method computes the grad ..."
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A new continuous adjoint formulation for the optimization of cascade airfoils with minimum total pressure losses, i.e. an objective function which has never been used before along with the continuous adjoint, is presented. To support a steepest descent algorithm, the adjoint method computes
ON THE NEWTONIAN COSMOLOGY EQUATIONS WITH PRESSURE
, 1996
"... The basic equations describing a Newtonian universe with uniform pressure are reexamined. We argue that in the semiclassical formulation adopted in the literature the continuity equation has a misleading pressure gradient term. When this term is removed, the resulting equations give the same homoge ..."
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The basic equations describing a Newtonian universe with uniform pressure are reexamined. We argue that in the semiclassical formulation adopted in the literature the continuity equation has a misleading pressure gradient term. When this term is removed, the resulting equations give the same
Results 1  10
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285