Avionics Modelling Environment

2021 ◽  
Author(s):  
Huseyin Sagirkaya ◽  
Kadriye Polat ◽  
Yusuf Erkam Yilmaz
Keyword(s):  
Modelling Environment

Development and Application of a Simulation Tool for Biomass Gasification Based Processes

2008 ◽  
Vol 6 (1) ◽  
Author(s):  
Tobias Pröll ◽  
Hermann Hofbauer
Keyword(s):  
Background Information ◽  
Simulation Tool ◽  
Water Steam ◽  
Organic Mixtures ◽  
Ideal Gases ◽  
Dual Fluidized Bed ◽  
Modelling Environment ◽  
Model Equations ◽  
Key Aspects ◽  
Energy Balances

A simulation tool for gasification based processes is presented for an equation-oriented, steady state modelling environment. The approach aims at an adequate description of phenomena linked to gasification. Background information is provided regarding the structure of the framework, thermodynamic data processing, and on the formulation of the model equations. The implemented substance streams are water/steam, ideal gases, inorganic solids, and organic mixtures. The models are based upon mass and energy balances and feature thermodynamic considerations. The addition of correlations for fluid dynamics or chemical kinetics is generally possible but not within the focus of this paper. The key-aspects of the typical unit-models, like pumps, turbines, heat exchangers, separators and chemical reactors are highlighted. The model of a dual-fluidized bed biomass gasifier is presented in detail. In a final case study, the suitability of the simulation tool is demonstrated for the description of the gasification-based biomass combined heat and power plant in Güssing/Austria.

A CAD Logic Modelling Environment

1985 ◽  
Vol 28 (4) ◽  
pp. 104-114 ◽  
Author(s):  
Aart Bijl
Keyword(s):  
Modelling Environment

scholarly journals Open Source for Water Management: including capabilities of MODFLOW-OWHM in the FREEWAT GIS modelling environment

2016 ◽  
Author(s):  
Iacopo Borsi ◽  
Rudy Rossetto ◽  
Massimiliano Cannata ◽  
Giovanna De Filippis ◽  
Matteo Ghetta
Keyword(s):  
Surface Waters ◽  
Water Resource Management ◽  
Complex Problem ◽  
Gis Analysis ◽  
Management Tools ◽  
Post Process ◽  
Process Procedures ◽  
Real World Applications ◽  
Modelling Environment ◽  
Gis Environment

FREEWAT is an ongoing GIS environment to serve as pre- and post-processor for running simulations of surface-/groundwater interaction, with the possibility to activate several features accounting for the different water stresses. This paper reports the capability related to address water resource management problems, by activating management tools available in the MODFLOW-OWHM code. The latter is integrated in FREEWAT, which appears as composite plugin of the well-know QGIS software (QGIS, 2016). Therefore, all the necessary pre- and post-process procedures can be run effectively within QGIS, also in conjunction with the several tools for GIS analysis already included in QGIS. It turns out a simple and intuitive user interface to manage the simulation of complex problem in which the mutual interaction among surface waters, groundwaters and anthropic water demand/supply terms can be handled. The development phase of such tools is already at an advanced stage, while next work will be focused on producing real-world applications to serve as tutorial for interest Users.

ICOME: An Immersive Collaborative 3D Object Modelling Environment

1999 ◽  
Vol 4 (2) ◽  
pp. 129-138 ◽  
Author(s):  
C. Raymaekers ◽  
T. De Weyer ◽  
K. Coninx ◽  
F. Van Reeth ◽  
E. Flerackers
Keyword(s):  
3D Object ◽  
Object Modelling ◽  
Modelling Environment

The Study of the Interaction of Humans With Wheelchairs to Improve the Design

2009 ◽  
Author(s):  
Shayne Gooch ◽  
Laura Hollingsworth ◽  
Tony Medland
Keyword(s):  
Experimental Investigation ◽  
Rough Terrain ◽  
Wheelchair Propulsion ◽  
Intended Purpose ◽  
Modelling Environment ◽  
Applied Forces ◽  
Improved Design

In order to evaluate a wheelchair design it is necessary to look at the capabilities of the user and the chair’s intended purpose. Whilst some chairs are only required to provide infrequent mobility indoors, others need to enable the user to travel great distances out doors over rough terrain. In this respect the chair should be considered in the same manner as any other ‘inclusive’ product (or be useable by all). There is a need to better understand the capabilities of different users and how this affects their ability to use a wheelchair for the express purpose required. A detailed experimental investigation was carried out into the wheelchair propulsion characteristics of people with paraplegia and tetraplegia. In this investigation, subjects’ posture, applied forces, and their strategies in applying forces to the wheel rims were studied. Three distinct postures and corresponding techniques were observed and subsequently modelled in a constraint-modelling environment. Here rules were developed that allowed these differing postures to be applied to a manikin representation and their effect upon the wheelchair mobility evaluated. From this study the needs for these classes of individuals were identified in order to allow the wheelchairs to be evaluated. Where conflicts existed between the chair and the user, different modifications in both chair and posture were proposed and assessed. Where no simple modifications exist such a study can provide the basis for a more radical and improved design.

Virtual Gas Turbines Part I: A Top-Down Geometry Modelling Environment for Turbomachinery Application

2021 ◽  
Author(s):  
Davendu Y. Kulkarni ◽  
Gan Lu ◽  
Feng Wang ◽  
Luca di Mare
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Large Scale ◽  
Logical Structure ◽  
System Level ◽  
Top Down ◽  
Design Intent ◽  
Geometry Model ◽  
Feature Based ◽  
Modelling Environment

Abstract The gas turbine engine design involves multi-disciplinary, multi-fidelity iterative design-analysis processes. These highly intertwined processes are nowadays incorporated in automated design frameworks to facilitate high-fidelity, fully coupled, large-scale simulations. The most tedious and time-consuming step in such simulations is the construction of a common geometry database that ensures geometry consistency at every step of the design iteration, is accessible to multi-disciplinary solvers and allows system-level analysis. This paper presents a novel design-intent-driven geometry modelling environment that is based on a top-down feature-based geometry model generation method. In the proposed object-oriented environment, each feature entity possesses a separate identity, denotes an abstract geometry, and carries a set of characteristics. These geometry features are organised in a turbomachinery feature taxonomy. The engine geometry is represented by a tree-like logical structure of geometry features, wherein abstract features outline the engine architecture, while the detailed geometry is defined by lower-level features. This top-down flexible arrangement of feature-tree enables the design intent to be preserved throughout the design process, allows the design to be modified freely and supports the design intent variations to be propagated throughout the geometry automatically. The application of the proposed feature-based geometry modelling environment is demonstrated by generating a whole-engine computational geometry. This geometry modelling environment provides an efficient means of rapidly populating complex turbomachinery assemblies. The generated engine geometry is fully scalable, easily modifiable and is re-usable for generating the geometry models of new engines or their derivatives. This capability also enables fast multi-fidelity simulation and optimisation of various gas turbine systems.

Integrating Measures and Redesigns in the Definition of Domain Specific Visual Languages

2009 ◽  
pp. 119-146
Author(s):  
Esther Guerra ◽  
Juan de Lara ◽  
Paloma Díaz
Keyword(s):  
Graph Transformation ◽  
Success Factor ◽  
Visual Languages ◽  
Model Quality ◽  
Web Engineering ◽  
Product Metrics ◽  
Model Driven ◽  
Domain Specific ◽  
Modelling Environment ◽  
Definition Of

The goal of this work is to facilitate the task of integrating measurement and redesign tools in modelling environments for Domain Specific Visual Languages (DSVLs), reducing or eliminating the necessity of coding. With this purpose, we have created a DSVL called SLAMMER that includes generalizations of some of the more used types of product metrics and frequent model manipulations, which can be easily customised for any other DSVL in a graphical way. The metric customisation process relies on visual patterns for the specification of the elements that should be measured in each metric type, while redesigns (as well as other actions) can be specified either personalizing generic templates or by means of graph transformation systems. The provided DSVL also allows creating new metrics, composing metrics, and executing actions guided by measurement values. The approach has been empirically validated by its implementation in a meta-modelling tool, which has been used for several DSVLs. In this way, together with the DSVL specification, a SLAMMER model can be provided containing a suite of metrics and actions that will become available in the final modelling environment. In this chapter we show a case study for a notation in the web engineering domain. As ensuring model quality is a key success factor in many computer science areas, even crucial in model-driven development, we believe that the results of this work benefit all of them by providing automatic support for the specification, generation and integration of measurement and redesign tools with modelling environments.

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