Training Workshops

FEFLOW Flow and Mass Transport Modeling

FEFLOW Flow and Mass Transport Modeling
Presented by Carlos Andres Rivera Villarreyes

Wednesday, September 22 | 8:30 AM – 4:00 PM | Salon E

FEFLOW brings a wide spectrum of tools to overcome the most simple challenges as well as complex flow and mass transport problems. This workshop will review the multiple modeling options for flow and mass transport using simple yet educational examples, and will focus mainly on higher-level “why” and “when” questions rather than narrow technical topics. This session is practical for both new and experienced users since it will give a quick overview of the software options as well as address punctual conceptual questions. 

Topics that will be covered include:

-Phreatic aquifers, when do we use pseudo-saturation and Richards equation?

-What do you consider a good mesh for flow and mass transport simulations?

-Overcoming numerical stability problems together: An overview of the different options, from mesh optimization to upwinding

-Reactive and multi-species transport: FEFLOW, PHREQC, or both together?

-Putting some density to the problem: In a nutshell, what are the necessary settings and concepts for density and viscosity-driven flow simulations?

-Matrix and fractures: What can we do for flow and mass transport modeling?

-Yes, we go unstructured! What can you get from it?

-Open discussion 

TSF Modeling-01

Tailings Storage Facilities (TSF) Modeling
Presented by Michael M. Gabora, Principal Hydrogeologist at FloSolutions

Wednesday, September 22 | 8:30 AM – 4:00 PM | Salon F

FEFLOW offers a robust manner in which to simulate fluid flow problems in tailings storage facilities (TSFs). The importance of improving our simulation of fluid flow and pore pressures in TSFs through time is at the forefront of the industry as these processes are important for facility stability and seepage.  This workshop will work through setting up TSF models, simulating hydromechanically coupled processes within FEFLOW and address how various facility phases and discharges can be simulated.
 
This session is practical for both new and experienced users since it will give a quick overview of the software options as well as address punctual conceptual questions.

Topics that will be covered include:

-Hydrogeologic conceptual models in the context of TSF models – key processes and components to be included in the numerical model;

-The set-up of models that focus on high-resolution fluid flow within TSFs;

-Simulating facilities that change through time including new lifts, changing pond locations, changes in discharge, etc.;

-Options for simulating changes in hydraulic properties through time as a result of consolidation and drainage;

-Variably saturated flow within TSFs and simulation approaches;

-Model calibration;

-Application of PEST in evaluating parameter and predictive uncertainty;

-Unstructured versus structured meshes and their application to TSF models;

-Simulating draindown, seepage collection systems, and active dewatering/depressurization; and

-Discussions around how we can improve our models of TSF pore pressures and seepage.

FEFLOW Fully-Unstructured Meshes for Challenging Geometries

FEFLOW Fully-Unstructured Meshes for Challenging Geometries
Presented by Carlos Andres Rivera Villarreyes

Wednesday, September 22 | 1:00 PM – 4:00 PM | Salon E

In this session, you will learn all the basic information to get started with 3D unstructured meshes, discuss multiple workflows and interoperability with other software (such as geological models), and get an overview of multiple tips, tricks and common user mistakes for data preparation. The session is recommended for beginners as well as users with experience in 3D meshing.

Topics that will be covered include:

-Creation of unstructured meshes using purely FEFLOW workflows and elevation data;

-Best practices of the 3D Layer Configurator for unstructured meshes;

-Building a 3D Supermesh using a geological model;

-Remeshing workflows: adding local geometrical changes;

-Reviewing meshing quality in 3D; and

-Best practices model parametrization for 3D unstructured models.

A Smooth Introduction to FEFLOW Python Interface

A Smooth Introduction to FEFLOW Python Interface
Presented by Carlos Andres Rivera Villarreyes

Thursday, September 23 | 8:30 AM – 4:00 PM | Salon E

During modelling work, we are continuously repeating tasks related to the model set-up and/or result evaluation. This workshop provides a smooth introduction to the FEFLOW Python Interface with the aim to minimize operational costs and automatize several workflows. We’ll provide fundamentals and approaches for FEFLOW customization using the Interface Manager IFM (C/C++) and the Python Interface. The session is mainly oriented in Python operations, but it also brings a basic background in C++ Interface, so you will come away with a complete understanding of the FEFLOW Application Programming Interface (API).

You will receive an overview of the necessary tools for optimizing your daily workflow as a groundwater modeller. With simple, but practical, applications, Carlos demonstrates pre and post-processing operations such as working with selections, adjusting parameter values, running model scenarios, and extracting model results in a customized manner. The development of automatic workflows may boost your efficiency in pre and post-processing numerical models. Moreover, the workshop will give multiple several hints about function documentation, user-tricks, and best approaches. The workshop will address the following topics:

-Why and when to use the Interface Manager (C/C++) and when to use Python

-Setting up Visual Studio and Python for getting started

-Using Callbacks, Kernel Control Methods and API

-Working with selections and manipulating material properties

-Export of model data (e.g., process variables, velocities)

-Running model scenarios and automated budget analysis

-Usage of nodal or elemental distributions for in and output of customer data

-Working with external Python libraries (Pandas, Matplotlib, Bokeh, etc.)

-Case stories

-Open discussion of capabilities and participant optimization “wishes”

Modeling the Interaction between Surface Water and Groundwater-01

Modeling the Interaction between Surface-Water and Groundwater
Presented by Douglas Graham

Thursday, September 23 | 8:30 AM – 4:00 PM | Salon F

It is widely recognized that groundwater and surface water are seldom isolated. Water resources management often requires a holistic approach to address the different, often conflicting, demands for water. In this session, we will look at coupled groundwater and surface water in FEFLOW, as well as using MIKE SHE for fully integrated hydrology. Importantly, we will discuss how MIKE SHE differs from FEFLOW, and how you can use both FEFLOW and MIKE SHE in the same project. After this session, participants will more fully appreciate the complexities of integrated catchment hydrology and be able to better communicate this knowledge to stakeholders.

Topics that will be covered include:

-The hydrologic processes in a catchment, including saturated and unsaturated subsurface flow, stream flow, flooding, and evapotranspiration;

-The interactions and feedbacks between land-use, climate, and hydrology;

-The simulation of these processes in FEFLOW and MIKE SHE; and

-The strengths and pitfalls of working with both FEFLOW and MIKE SHE in your projects.

DHI Water & Environment, Inc. | www.dhigroup.com

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