The Experts below are selected from a list of 222831 Experts worldwide ranked by ideXlab platform

Helmut E Feustel - One of the best experts on this subject based on the ideXlab platform.

  • comis an international multizone air Flow and contaminant transport model
    Energy and Buildings, 1999
    Co-Authors: Helmut E Feustel
    Abstract:

    Abstract A number of interzonal models have been developed to calculate air Flows and pollutant transport mechanisms in both single and multizone buildings. A recent development in multizone air-Flow Modeling, the COMIS model, has a number of capabilities that go beyond previous models, much as COMIS can be used as either a stand-alone air-Flow model with input and output features or as an infiltration module for thermal building simulation programs. COMIS was designed during a 12 month workshop at Lawrence Berkeley National Laboratory (LBNL) in 1988–1989. In 1990, the Executive Committee of the International Energy Agency's Energy Conservation in Buildings and Community Systems program created a working group on multizone air-Flow Modeling, which continued work on COMIS. The group's objectives were to study physical phenomena causing air Flow and pollutant (e.g., moisture) transport in multizone buildings, develop numerical modules to be integrated in the previously designed multizone air Flow Modeling system, and evaluate the computer code. The working group supported by nine nations, officially finished in late 1997 with the release of IISiBat/COMIS 3.0, which contains the documented simulation program COMIS, the user interface IISiBat, and reports describing the evaluation exercise. This paper serves as an introduction for the other publications included in this Special Issue.

  • comis an international multizone air Flow and contaminant transport model
    Energy and Buildings, 1999
    Co-Authors: Helmut E Feustel
    Abstract:

    Abstract A number of interzonal models have been developed to calculate air Flows and pollutant transport mechanisms in both single and multizone buildings. A recent development in multizone air-Flow Modeling, the COMIS model, has a number of capabilities that go beyond previous models, much as COMIS can be used as either a stand-alone air-Flow model with input and output features or as an infiltration module for thermal building simulation programs. COMIS was designed during a 12 month workshop at Lawrence Berkeley National Laboratory (LBNL) in 1988–1989. In 1990, the Executive Committee of the International Energy Agency's Energy Conservation in Buildings and Community Systems program created a working group on multizone air-Flow Modeling, which continued work on COMIS. The group's objectives were to study physical phenomena causing air Flow and pollutant (e.g., moisture) transport in multizone buildings, develop numerical modules to be integrated in the previously designed multizone air Flow Modeling system, and evaluate the computer code. The working group supported by nine nations, officially finished in late 1997 with the release of IISiBat/COMIS 3.0, which contains the documented simulation program COMIS, the user interface IISiBat, and reports describing the evaluation exercise. This paper serves as an introduction for the other publications included in this Special Issue.

  • comis an international multizone air Flow and contaminant transport model
    Other Information: PBD: Aug 1998, 1998
    Co-Authors: Helmut E Feustel
    Abstract:

    A number of interzonal models have been developed to calculate air Flows and pollutant transport mechanisms in both single and multizone buildings. A recent development in multizone air-Flow Modeling, the COMIS model, has a number of capabilities that go beyond previous models, much as COMIS can be used as either a stand-alone air-Flow model with input and output features or as an infiltration module for thermal building simulation programs. COMIS was designed during a 12 month workshop at Lawrence Berkeley National Laboratory (LBNL) in 1988-89. In 1990, the Executive Committee of the International Energy Agency`s Energy Conservation in Buildings and Community Systems program created a working group on multizone air-Flow Modeling, which continued work on COMIS. The group`s objectives were to study physical phenomena causing air Flow and pollutant (e.g., moisture) transport in multizone buildings, develop numerical modules to be integrated in the previously designed multizone air Flow Modeling system, and evaluate the computer code. The working group supported by nine nations, officially finished in late 1997 with the release of IISiBat/COMIS 3.0, which contains the documented simulation program COMIS, the user interface IISiBat, and reports describing the evaluation exercise.

  • comis an international multizone air Flow and contaminant transport model
    Other Information: PBD: Aug 1998, 1998
    Co-Authors: Helmut E Feustel
    Abstract:

    A number of interzonal models have been developed to calculate air Flows and pollutant transport mechanisms in both single and multizone buildings. A recent development in multizone air-Flow Modeling, the COMIS model, has a number of capabilities that go beyond previous models, much as COMIS can be used as either a stand-alone air-Flow model with input and output features or as an infiltration module for thermal building simulation programs. COMIS was designed during a 12 month workshop at Lawrence Berkeley National Laboratory (LBNL) in 1988-89. In 1990, the Executive Committee of the International Energy Agency`s Energy Conservation in Buildings and Community Systems program created a working group on multizone air-Flow Modeling, which continued work on COMIS. The group`s objectives were to study physical phenomena causing air Flow and pollutant (e.g., moisture) transport in multizone buildings, develop numerical modules to be integrated in the previously designed multizone air Flow Modeling system, and evaluate the computer code. The working group supported by nine nations, officially finished in late 1997 with the release of IISiBat/COMIS 3.0, which contains the documented simulation program COMIS, the user interface IISiBat, and reports describing the evaluation exercise.

Piero Fraternali - One of the best experts on this subject based on the ideXlab platform.

  • formal semantics of omg s interaction Flow Modeling language ifml for mobile and rich client application model driven development
    Journal of Systems and Software, 2018
    Co-Authors: Carlo Bernaschina, Sara Comai, Piero Fraternali
    Abstract:

    Abstract Model Driven Engineering relies on the availability of software models and of development tools supporting the transition from models to code. The generation of code from models requires the unambiguous interpretation of the semantics of the Modeling languages used to specify the application. This paper presents the formalization of the semantics of the Interaction Flow Modeling Language (IFML), a recent OMG MDA standard conceived for the specification of the front-end part of interactive applications. IFML constructs are mapped to equivalent structures of Place Chart Nets (PCN), which allows their precise interpretation. The defined semantic mapping is implemented in an online Model-driven development environment that enables the creation and inspection of PCNs from IFML, the analysis of the behavior of IFML specifications via PCN simulation, and the generation of code for mobile and web-based architectures.

  • interaction Flow Modeling language model driven ui engineering of web and mobile apps with ifml
    2014
    Co-Authors: Marco Brambilla, Piero Fraternali
    Abstract:

    Interaction Flow Modeling Language describes how to apply model-driven techniques to the problem of designing the front end of software applications, i.e., the user interaction. The book introduces the reader to the novel OMG standard Interaction Flow Modeling Language (IFML). Authors Marco Brambilla and Piero Fraternali are authors of the IFML standard and wrote this book to explain the main concepts of the language. They effectively illustrate how IFML can be applied in practice to the specification and implementation of complex web and mobile applications, featuring rich interactive interfaces, both browser based and native, client side components and widgets, and connections to data sources, business logic components and services. Interaction Flow Modeling Language provides you with unique insight into the benefits of engineering web and mobile applications with an agile model driven approach. Concepts are explained through intuitive examples, drawn from real-world applications. The authors accompany you in the voyage from visual specifications of requirements to design and code production. The book distills more than twenty years of practice and provides a mix of methodological principles and concrete and immediately applicable techniques. Learn OMGs new IFML standard from the authors of the standard with this approachable reference Introduces IFML concepts step-by-step, with many practical examples and an end-to-end case example Shows how to integrate IFML with other OMG standards including UML, BPMN, CWM, SoaML and SysML Discusses how to map models into code for a variety of web and mobile platforms and includes many useful interface Modeling patterns and best practices

Wlodzimierz Wroblewski - One of the best experts on this subject based on the ideXlab platform.

  • single and two fluid models for steam condensing Flow Modeling
    International Journal of Multiphase Flow, 2011
    Co-Authors: Slawomir Dykas, Wlodzimierz Wroblewski
    Abstract:

    Abstract The paper presents a description of two models dedicated to steam condensing Flow Modeling. The models are implemented into an in-house computational fluid dynamics (CFD) code that has been successfully applied to a wet steam Flow calculation for many years now. Both models use the same condensation model that has been validated against the majority of available experimental data. The state equations for vapor and liquid water, the physical model as well as the numerical techniques of solution to Flow governing equations have been presented. For the single-fluid model (SFM), the Reynolds-averaged Navier–Stokes (RANS) equations for vapor/liquid mixture are solved, whereas the two-fluid model solves separate Flow governing equations for the compressible, viscous and turbulent vapor phase and for the compressible and inviscid liquid phase. Both described models have been compared with relation to the Flow through the Laval nozzle.

  • steam condensing Flow Modeling in turbine channels
    International Journal of Multiphase Flow, 2009
    Co-Authors: Wlodzimierz Wroblewski, Slawomir Dykas, Aleksandra Gepe
    Abstract:

    Abstract The numerical method for Modeling of the transonic steam Flows with homogeneous and/or heterogeneous condensation has been presented. The experiments carried out for the Laval nozzles, for 2-D turbine cascades and for a 3-D Flow in real turbine were selected to validate an in-house CFD code adjusted to the calculations of the steam condensing Flows in complicated geometries. The sensitivity of the condensation model and difficulties in the validation process of the CFD code have been discussed. These difficulties limit the possibilities of verification and improvement of the condensation theory based on the existing experimental data. The numerical simulations were based on the time-dependent 3-D Reynolds averaged Navier–Stokes (RANS) equations coupled with two-equations turbulence model ( k–ω SST) and additional conservation equations for the liquid phase. The set of governing equations has been closed by a ‘local’ real gas equation of state. The condensation phenomena were modeled on the basis of the classical nucleation theory. The heterogeneous condensation model on the insoluble as well as soluble impurities was implemented into presented CFD code. The system of governing equations was solved by means of a finite volume method on a multi-block structural grid.

Slawomir Dykas - One of the best experts on this subject based on the ideXlab platform.

  • single and two fluid models for steam condensing Flow Modeling
    International Journal of Multiphase Flow, 2011
    Co-Authors: Slawomir Dykas, Wlodzimierz Wroblewski
    Abstract:

    Abstract The paper presents a description of two models dedicated to steam condensing Flow Modeling. The models are implemented into an in-house computational fluid dynamics (CFD) code that has been successfully applied to a wet steam Flow calculation for many years now. Both models use the same condensation model that has been validated against the majority of available experimental data. The state equations for vapor and liquid water, the physical model as well as the numerical techniques of solution to Flow governing equations have been presented. For the single-fluid model (SFM), the Reynolds-averaged Navier–Stokes (RANS) equations for vapor/liquid mixture are solved, whereas the two-fluid model solves separate Flow governing equations for the compressible, viscous and turbulent vapor phase and for the compressible and inviscid liquid phase. Both described models have been compared with relation to the Flow through the Laval nozzle.

  • steam condensing Flow Modeling in turbine channels
    International Journal of Multiphase Flow, 2009
    Co-Authors: Wlodzimierz Wroblewski, Slawomir Dykas, Aleksandra Gepe
    Abstract:

    Abstract The numerical method for Modeling of the transonic steam Flows with homogeneous and/or heterogeneous condensation has been presented. The experiments carried out for the Laval nozzles, for 2-D turbine cascades and for a 3-D Flow in real turbine were selected to validate an in-house CFD code adjusted to the calculations of the steam condensing Flows in complicated geometries. The sensitivity of the condensation model and difficulties in the validation process of the CFD code have been discussed. These difficulties limit the possibilities of verification and improvement of the condensation theory based on the existing experimental data. The numerical simulations were based on the time-dependent 3-D Reynolds averaged Navier–Stokes (RANS) equations coupled with two-equations turbulence model ( k–ω SST) and additional conservation equations for the liquid phase. The set of governing equations has been closed by a ‘local’ real gas equation of state. The condensation phenomena were modeled on the basis of the classical nucleation theory. The heterogeneous condensation model on the insoluble as well as soluble impurities was implemented into presented CFD code. The system of governing equations was solved by means of a finite volume method on a multi-block structural grid.

Carlo Bernaschina - One of the best experts on this subject based on the ideXlab platform.

  • formal semantics of omg s interaction Flow Modeling language ifml for mobile and rich client application model driven development
    Journal of Systems and Software, 2018
    Co-Authors: Carlo Bernaschina, Sara Comai, Piero Fraternali
    Abstract:

    Abstract Model Driven Engineering relies on the availability of software models and of development tools supporting the transition from models to code. The generation of code from models requires the unambiguous interpretation of the semantics of the Modeling languages used to specify the application. This paper presents the formalization of the semantics of the Interaction Flow Modeling Language (IFML), a recent OMG MDA standard conceived for the specification of the front-end part of interactive applications. IFML constructs are mapped to equivalent structures of Place Chart Nets (PCN), which allows their precise interpretation. The defined semantic mapping is implemented in an online Model-driven development environment that enables the creation and inspection of PCNs from IFML, the analysis of the behavior of IFML specifications via PCN simulation, and the generation of code for mobile and web-based architectures.