Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
THE INFLUENCE OF THE FLOW RATE ON THE JET IMPACT FORCE
Submission Author:
Jonatas Borges , MT
Co-Authors:
Jonatas Borges, Sammy Cristopher Paredes Puelles, Elie Luis Martínez Padilla, Marcos Lourenço
Presenter: Sammy Cristopher Paredes Puelles
doi://10.26678/ABCM.COBEM2019.COB2019-0650
Abstract
The present work aims to study a simplified case study of well drilling in the bottom hole, where the drill bit is represented by a sudden contraction, to determine the influence of the flow rate on the jet impact force which is an important factor in oil and gas well drilling operations. In the present case, the distance between the drill bit and the bottom hole, and the diameter of the drill bit was kept the same for all simulations. In order to solve this problem, the numerical platform in development has a parallel distributed-memory implementation to solve the Navier-Stokes equations. The Finite Volume Method is used in the spatial discretization where the diffusive terms approximated by the central differences method. The temporal discretization is accomplished using the Adams-Bashforth method. Both temporal and spatial discretizations are of second-order of accuracy. The Velocity-pressure coupling is done using the fractional-step method of two steps. The immersed boundary method (IB) is employed to represent the walls of the proposed problem while using a Cartesian mesh by adding a force term in the governing equations. The dynamic sub- grid scale Smagorinsk model has been used to calculate the turbulent viscosity. The present results are compared with other published literature, where it was showed that the jet impact force and the peak pressure on the impacted surface increase with the increment of the flow rate.
Keywords
Computational fluid dynamics (CFD), Immersed Boundary Method, Jet impact force, Oil well drilling
