scholarly journals Numerical modeling of coupled fluid flow, heat transport and mechanical deformation: An example from the Chanziping ore district, South China

2011 ◽  
Vol 2 (4) ◽  
pp. 577-582 ◽  
Author(s):  
Minghui Ju ◽  
Jianwen Yang
Keyword(s):  
Numerical Modeling ◽  
Fluid Flow ◽  
Heat Transport ◽  
South China ◽  
Mechanical Deformation ◽  
Flow Heat ◽  
Ore District

Coupled fluid flow, heat and mass transport, and erosion in the Alberta basin: implications for the origin of the Athabasca oil sands

2004 ◽  
Vol 41 (9) ◽  
pp. 1077-1095 ◽  
Author(s):  
J J Adams ◽  
B J Rostron ◽  
C A Mendoza
Keyword(s):  
Fluid Flow ◽  
Heat Transport ◽  
Oil Sands ◽  
Conductive Heat ◽  
Formation Water ◽  
Athabasca Oil Sands ◽  
Peace River ◽  
Regional Topography ◽  
Alberta Basin ◽  
Flow Heat

Regional topography-driven flow systems related to Laramide tectonic rebound were simulated using two-dimensional, coupled fluid-flow, heat transport, and solute transport numerical models to replicate present formation water salinity and temperature distributions and investigate the accumulation of the Athabasca oil sands. Previous modelling of this system was replicated, and it predicted repeated replacement of all basin formation water with freshwater during deposition of the oil sands due to high permeabilities. To match present Alberta basin temperature and salinity distributions, model hydrostratigraphy, permeabilities, and heat fluxes were adjusted. This revised model conducts fluids along the Mannville aquifer, rather than the Upper Devonian aquifer, and replicates present salinity distributions, assuming instantaneous uplift around 60 Ma. Fluid fluxes in principal aquifers decrease by two-orders of magnitude using new permeabilities, resulting in primarily conductive heat transport. Thus, genesis of the Athabasca oil sands cannot be explained by dissolved-phase petroleum transport due to low simulated fluxes. Model simulations representing constant erosion of a higher topographic gradient produce similar flow patterns, but fluid fluxes, temperatures and hydraulic heads uniformly decrease over 58 million years. Increased erosion rates in the last stage of simulations produce sub-hydrostatic pressures near the uplift, which trigger a flow reversal in the basin. Thinning of the capping Cretaceous aquitard and Mannville permeability distribution causes discharge in the vicinity of the Peace River, coincident with Peace River oil sands and solonetzic soil zones. Regional topography-driven flow gradually decays via diminishing fluid fluxes, underpressuring near the disturbed belt, and development of local flow sub-systems driven by small-scale relief.

scholarly journals Numerical modeling of fluid flow, heat, and mass transfer for similar and dissimilar laser welding of Ti-6Al-4V and Inconel 718

2021 ◽  
Author(s):  
Amir Hossein Faraji ◽  
Carmine Maletta ◽  
Giuseppe Barbieri ◽  
Francesco Cognini ◽  
Luigi Bruno
Keyword(s):  
Mass Transfer ◽  
Numerical Modeling ◽  
Fluid Flow ◽  
Laser Welding ◽  
Weld Pool ◽  
Inconel 718 ◽  
Dissimilar Welding ◽  
Flow Heat ◽  
Pool Formation ◽  
Dissimilar Laser Welding

AbstractMost of the researches published on the numerical modeling of laser welding are looking at similar welding, mainly due to the difficulty of simulating the mixing phenomenon that occurs in dissimilar welding. Furthermore, numerical modeling of dissimilar laser welding of titanium and nickel alloys has been rarely reported in the literature. In this study, a 3D finite volume numerical model is proposed to simulate fluid flow, heat, and mass transfer for similar and dissimilar laser welding of Ti-6Al-4V and Inconel 718. The laser source was simulated by volumetric heat distribution, which considers the effects of keyhole and heat transfer on the workpiece. The heat source parameters were calibrated through preliminary experiments, by comparing the simulated and experimental weld pool shapes and dimensions. The model was used to simulate both homogenous and dissimilar laser weldings of Ti-6Al-4V and Inconel 718, and a systematic comparison was carried out through a number of selected experiments. The effects of three distinct levels of laser power (1.25 kW, 1.5 kW, 2.5 kW) on temperature distribution and velocity field in the welds pool were analyzed. Results highlighted the effects of Marangoni forces in the weld pool formation. Furthermore, in order to analyze the mass transfer phenomenon in dissimilar welding, species transfer equations were considered, demonstrating the important role played by the mass mixture in the weld pool formation. Finally, a high level of agreement between simulations and experiments—in terms of weld pool shape and dimensions—was observed in all cases analyzed. This proves the ability of the proposed numerical model to properly simulate both the similar and dissimilar welding of Ti-6Al-4V and Inconel 718 alloys.

NUMERICAL MODELING OF NON-NEWTONIAN FLUID FLOW BETWEEN POROUS DISKS IN THE PRESENCE OF NANOPARTICLES

2017 ◽  
Vol 8 (1) ◽  
pp. 67-83
Author(s):  
M. Zubair Akbar Qureshi ◽  
Kashif Ali ◽  
Muhammad Farooq Iqbal ◽  
Muhammad Ashraf
Keyword(s):  
Numerical Modeling ◽  
Fluid Flow ◽  
Newtonian Fluid

Development of a Transient Model for Fluid Flow, Heat Transfer and Pressure Buildup in Wellbores

2020 ◽  
Author(s):  
Ianto Martins ◽  
Arthur Pandolfo da Veiga ◽  
Eduardo Alves ◽  
Jader Barbosa
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Transient Model ◽  
Pressure Buildup ◽  
Flow Heat
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