Computer simulation of polymers in thin layers. I. Polymer melt between neutral walls – static properties

1991 ◽  
Vol 95 (6) ◽  
pp. 4685-4690 ◽  
Author(s):  
Tadeusz Pakula
Keyword(s):  
Computer Simulation ◽  
Polymer Melt ◽  
Thin Layers ◽  
Static Properties

scholarly journals Flow Simulation Using Local Grid Refinements to Model Laminated Reservoirs

2018 ◽  
Vol 73 ◽  
pp. 5 ◽  
Author(s):  
Manuel Gomes Correia ◽  
Célio Maschio ◽  
Denis José Schiozer
Keyword(s):  
Simulation Model ◽  
Dynamic Properties ◽  
Flow Behavior ◽  
Flow Simulation ◽  
Coarse Grid ◽  
Thin Layers ◽  
Static Properties ◽  
Dynamic Representation ◽  
Medium Flow ◽  
Local Grid

Super-giant carbonate fields, such as Ghawar, in Saudi Arabia, and Lula, at the Brazilian pre-salt, show highly heterogeneous behavior that is linked to high permeability intervals in thin layers. This article applies Local Grid Refinements (LGR) integrated with upscaling procedures to improve the representation of highly laminated reservoirs in flow simulation by preserving the static properties and dynamic trends from geological model. This work was developed in five main steps: (1) define a conventional coarse grid, (2) define LGR in the conventional coarse grid according to super-k and well locations, (3) apply an upscaling procedure for all scenarios, (4) define LGR directly in the simulation model, without integrate geological trends in LGR and (5) compare the dynamic response for all cases. To check results and compare upscaling matches, was used the benchmark model UNISIM-II-R, a refined model based on a combination of Brazilian Pre-salt and Ghawar field information. The main results show that the upscaling of geological models for coarse grid with LGR in highly permeable thin layers provides a close dynamic representation of geological characterization compared to conventional coarse grid and LGR only near-wells. Pseudo-relative permeability curves should be considered for (a) conventional coarse grid or (b) LGR scenarios under dual-medium flow simulations as the upscaling of discrete fracture networks and dual-medium flow models presents several limitations. The conventional approach of LGR directly in simulation model, presents worse results than LGR integrated with upscaling procedures as the extrapolation of dynamic properties to the coarse block mismatch the dynamic behavior from geological characterization. This work suggests further improvements for results for upscaling procedures that mask the flow behavior in highly laminated reservoirs.

Computer simulation of steady polymer melt spinning

1981 ◽  
Vol 21 (13) ◽  
pp. 844-853 ◽  
Author(s):  
Del Kenneth Gagon ◽  
Morton M. Denn
Keyword(s):  
Computer Simulation ◽  
Melt Spinning ◽  
Polymer Melt

Equilibrium Dynamics of an Associating Polymer Melt in Narrow Slits by Computer Simulation

2007 ◽  
Vol 111 (16) ◽  
pp. 4141-4149 ◽  
Author(s):  
Marco Malvaldi ◽  
Samantha Bruzzone ◽  
Guido Raos ◽  
Giuseppe Allegra
Keyword(s):  
Computer Simulation ◽  
Polymer Melt ◽  
Equilibrium Dynamics ◽  
Associating Polymer

Real-Times Snowfall Simulation Based on Particle System and Pulverization

2013 ◽  
Vol 373-375 ◽  
pp. 1168-1171 ◽  
Author(s):  
Hong Yan Lv ◽  
Fang Liu
Keyword(s):  
System Theory ◽  
Computer Simulation ◽  
Real Time ◽  
Virtual Environment ◽  
Particle System ◽  
Dynamic Properties ◽  
Simulation Methods ◽  
Static Properties ◽  
Simulation Based

Snowfall process is analyzed from the perspective of computer simulation in this paper, the dynamic properties and the static properties of snow particles are abstracted based on particle system theory. The snow particles movement is simulated with wind and no wind. To solve the problems of the blur of snowing environment and firn phenomena, the paper puts forward a method of applying pulverization to snowing virtual environment. The tests show that the simulation methods of snowfall and pulverization are effective and real, which are suit for real-time virtual environment.

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