Essays about: "one-dimensional modelling"

Showing result 11 - 15 of 25 essays containing the words one-dimensional modelling.

  1. 11. Solution of the Stefan problem with general time-dependent boundary conditions using a random walk method

    University essay from

    Author : Daniel Stoor; [2019]
    Keywords : Stefan problem; random walk method; moving boundary; heat transfer;

    Abstract : This work deals with the one-dimensional Stefan problem with a general time- dependent boundary condition at the fixed boundary. The solution will be obtained using a discrete random walk method and the results will be compared qualitatively with analytical- and finite difference method solutions. READ MORE

  3. 12. Model Based Catalyst Control

    University essay from Linköpings universitet/Fordonssystem

    Author : Svraka Irman; Österdahl Wetterhag Linus; [2019]
    Keywords : Three Way Catalyst; lambda; Control; Emissions; Model; MATLAB; Simulink; Targetlink.;

    Abstract : A one dimensional discretized model of a two brick three way catalyst (TWC) system was developed and implemented in MATLAB, Simulink and TargetLink in collaboration with Volvo Cars and Linköpings Universitet - ISY. The purpose of this thesis was to increase system understanding and create a model based TWC control for further development at Volvo Cars. READ MORE

  4. 13. Modelling cross-laminated timber floors in dynamic analysis - Eigenfrequency prediction

    University essay from Lunds universitet/Institutionen för byggvetenskaper; Lunds universitet/Byggnadsmekanik

    Author : Johannes Wetterholt; [2019]
    Keywords : finite element method; FEM; dynamic analysis; Eigenfrequency; CLT; cross-laminated timber; cross-laminated timber floors; wooden floors; Technology and Engineering;

    Abstract : In the late 1990s cross-laminated timber (CLT) was developed. The development of CLT was a project aimed to produce a structural product that could compete with the concrete industry and contribute to a reduced effect on the environment, due to the low environmental impact of timber in relation to other building materials. READ MORE

  5. 14. Grey-box modelling of distributed parameter systems

    University essay from KTH/Beräkningsvetenskap och beräkningsteknik (CST)

    Author : Patrik Barkman; [2018]
    Keywords : grey-box; distributed parameter system; partial differential equations; chemical reactions; finite element method; FEM; machine learning; neural networks; hybridmodell; distribuerade parametersystem; partiella differentialekvationer; kemiska reaktioner; finita elementmetoden; FEM; maskininlärning; neuronnätverk;

    Abstract : Grey-box models are constructed by combining model components that are derived from first principles with components that are identified empirically from data. In this thesis a grey-box modelling method for describing distributed parameter systems is presented. READ MORE

  6. 15. Pressure loss characterization for cooling and secondary air system components in gas turbines

    University essay from Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Author : Frida Isaksson; [2017]
    Keywords : Gas turbines; cooling and secondary air system; pressure losses; discharge coefficient; minor loss; one-dimensional modelling;

    Abstract : There is a constant struggle to increase the efficiency in gas turbines, where one method is to have a higher inlet temperature to the turbine. Often, this results in temperatures higher than the critical temperature of the materials, which makes cooling of the components an important part of the turbine. READ MORE