Here you will find presentations given at COMSOL Conferences around the globe. The presentations explore the innovative research and products designed by your peers using COMSOL Multiphysics. Research topics span a wide array of industries and application areas, including the electrical, mechanical, fluid, and chemical disciplines. Use the Quick Search to find presentations pertaining to your application area.

Multiphysics Modelling of Standing Column Well and Implementation of Heat Pumps Off-Loading Sequence

A. Nguyen[1], P. Pasquier[1], D. Marcotte[1]
[1] Department of Civil, Geological and Mining Engineering, École Polytechnique de Montréal, Montréal, QC, Canada

A fully coupled multiphysics model involving heat transfer and groundwater flow within a SCW and its surrounding ground was implemented in COMSOL Multiphysics 4.2a with MATLAB to simulate a 24-hour heating operation. The heat pumps were modeled using interpolation functions thereby allowing the effect of the pumped water temperature on the capacity and coefficient of performance of the heat ...

Energy Pile Simulation – an Application of THM-Modeling - new

E. Holzbecher[1]
[1]Georg-August University, Göttingen, Germany

Energy piles, i.e. heat exchangers located within the foundation piles of buildings, are used for heating of cooling purposes. Although the absolute values of deformations and temperature gradients are low or moderate, the entire setting can be influenced by thermo-hydro-mechanical coupling. The fluctuating thermal regime may affect the deformation of pile and surrounding ground as effect of ...

Numerical Study of Flux Models for CO2 - Enhanced Natural Gas Recovery and Potential CO2 Storage in Shale Gas Reservoirs - new

N. Prajapati[1], P. L. Mills[1]
[1]Department of Chemical & Natural Gas Engineering, Texas A&M University, Kingsville, TX, USA

This work encompasses different physics involved in fluid flow in shale gas reservoir. Non-linear equations for fluid flow are solved with COMSOL Multiphysics® PDE module. It focuses on comparing the performance of various species transport flux models by accounting for inter-molecular interactions and gas-rock interactions.

Finite Element-Based Characterization of Viscoelastic Materials

X. Song [1], S. Dircks [1], D. Mirosnikov [1], B. Lassen [2],
[1] Mads Clausen Institute, SDU, Sønderborg, Denmark
[2] DONG Energy, Fredericia, Denmark

The objective of this study is to acquire a full characterization of a hyper-elastic material. The process is realized by performing a Dynamic Mechanical Analysis (DMA) with a viscoelastic material, which is extended by image processing algorithms in order to measure the changing distance of two dots in the direction of contraction. Due to the non-linear behavior of the material, the model ...

CFD Simulation of Pore Pressure Oscillation Method to Measure the Permeability of Tight Formations

M. Mokhtari [1], S. A. Madani [1], A. Seibi [1],
[1] Department of Petroleum Engineering, University of Louisiana at Lafayette, Lafayette, LA, USA

Accurate estimation of rock permeability and porosity play a crucial role in the evaluation of oil and gas reservoirs. This evaluation is, however, challenging in tight formations such as shale due to the slow transition of fluid in such formations with extremely-low permeability. To overcome the long experimental time of conventional technique for permeability measurement (steady-state method), ...

Aquifer Physics Modes for Hydrogeological Modeling – an Application of the COMSOL Physics Builder

E. Holzbecher[1]
[1]Georg-August Universität Göttingen, Göttingen, Germany

Although there are porous media and subsurface flow modes available in a toolbox of COMSOL Multiphysics®, some common requirements in hydrogeological models can not be easily accessed in the graphical user interface. Most crucially, there is no distinction between confined and unconfined situations for permeable layers, so called aquifers. Using the Physics Builder for such distinctions aquifer ...

Modeling and Simulation of the Consolidation Behaviour of Cemented Paste Backfill

L. Cui [1], M. Fall [1],
[1] University of Ottawa, Ottawa, ON, Canada

In underground mining operations, the mined-out spaces (called stopes) need to be backfilled to maintain the stability of surrounding rock mass and increase the ore recovery. Cemented paste backfill (CPB), a mixture of water, binder, and tailings, has been intensively utilized in underground mining operations to fill the stopes. After preparation, the fresh CPB is transported into stopes via ...

Poroelasticity Benchmarking for FEM on Analytical Solutions

E. Holzbecher[1]
[1]Georg-August Universität Göttingen, Göttingen, Germany

We examine the poroelastics mode, which couples hydraulics and mechanics by some basic benchmarks. For cases with analytical solutions we check the accuracy for changing meshes and calculate the convergence rate.

Quantification of Porosity Changes Due to Precipitation of Cement Materials with iCP

D. Sampietro [1], E. Abarca [1], M. Bayer [1], S. Jordana [1], J. Molinero [1], T. Tanaka [2], S. Hashimoto [2], T. Iwatsuki [3], H. Onoe [3], H. Saegusa [3]
[1] Amphos 21 Consulting, Barcelona, Spain
[2] Obayashi Corporation, Tokyo, Japan
[3] Japan Atomic Energy Agency, Gifu, Japan

The Japan Atomic Energy Agency (JAEA) is carrying out an URL (Underground Research Laboratory) project in Mizunami city, central Japan. The project is a purpose-built generic URL project that is planned for a scientific study of the deep geological environment in fractured crystalline rock as a basis of research and development for geological disposal of nuclear waste. The concrete material ...

Simulation of Ground Heat Exchanger for Cryogenic Applications

F. Bergeron[1], P. Pasquier[1]
[1]École Polytechnique de Montréal, Montréal, QC, Canada

Ground freezing techniques using liquid nitrogen are commonly used in order to increase the mechanical properties of the soils. This article presents a new ground heat exchanger using aluminum to increase the effective radius of the heat exchanger. Simulation results indicate that the current design generates a significant thermal short-circuit between the circulation pipes that must be ...