Essays about: "turbulence"

Showing result 31 - 35 of 378 essays containing the word turbulence.

  1. 31. Aerodynamic Analysis of Reflex Airfoils at Low Reynolds Numbers

    University essay from KTH/Skolan för teknikvetenskap (SCI)

    Author : Alexander Elliott Meyer Ströborg; [2022]
    Keywords : low Reynolds number; reflex airfoils; CFD; XFOIL;

    Abstract : Low Reynolds number airfoil analysis has become increasingly significant as urban air mobility vehicles and unmanned aerial vehicles surge in popularity. The Green Raven project at KTH Aero aims to use reflex airfoils where little data is available beyond classical analysis. READ MORE

  3. 32. The Impact of COVID-19 on Public Capital Markets - Empirical Evidence from the Nordics

    University essay from Handelshögskolan i Stockholm/Institutionen för finansiell ekonomi

    Author : Yishu Liu; Mashiat Nawal Chowdhury; [2022]
    Keywords : COVID-19; Capital market; Nordics; Bond spread;

    Abstract : How did the COVID-19 pandemic affect firms' ability to raise capital? This paper explores how non-financial Nordic firms raised capital from public debt and equity markets during the pandemic. We find that (1) the bond market experiences turbulence during the outbreak period; (2) being a rated bond issuer is only important for access during the outbreak period; (3) factors that determine bond spreads during the normal period do not change fundamentally during the COVID-19 period; (4) the equity market is an important source of capital throughout the COVID-19 period in terms of both IPOs and secondary issues. READ MORE

  4. 33. Innovating the learning process in higher education throughthe integration of theory and practice in partnership with Industry and Students

    University essay from KTH/Skolan för industriell teknik och management (ITM)

    Author : Daniel Anderson Mlabwa; Farhang Hajipour; [2022]
    Keywords : VUCA; Work-Integrated Learning; Knowledge-Economy; Learning Innovation; Paradigm Shift; Higher Education; Employability; Experiential Learning; VUCA Prime.;

    Abstract : The VUCA (which stands for volatility, uncertainty, complexity, and ambiguity) conditions have overshadowed the national and global higher education systems, and social and economic systems are increasingly becoming dependent on knowledge and innovations. There is a call for the global higher education systems to attain a new set of quality standards (Waller et al. READ MORE

  5. 34. Uncertainty quantification for offshore wind turbines

    University essay from KTH/Matematik (Avd.)

    Author : Ziming Wang; [2022]
    Keywords : wind energy; uncertainty propagation; polynomial chaos; Rosenblatt transformation; quadrature; regression; vindenergi; osäkerhetsutbredning; polynomkaos; Rosenblatt transformation; kvadratur; regression;

    Abstract : Wind energy is a field with a large number of uncertainties. The random nature of the weather conditions, including wind speed, wind direction, and turbulence intensity, influences the energy output and the structural safety of a wind farm, making its performance fluctuate and difficult to predict. READ MORE

  6. 35. Verification and validation of the implementation of an Algebraic Reynolds-Stress Model for stratified boundary layers

    University essay from KTH/Teknisk mekanik

    Author : Martina Formichetti; [2022]
    Keywords : Atmospheric boundary layer; turbulence modelling; stratified flows; eddy viscosity; eddy diffusivity;

    Abstract : This thesis studies the implementation of an Explicit Algebraic Reynolds-Stress Model(EARSM) for Atmospheric Boundary Layer (ABL) in an open source ComputationalFluid Dynamics (CFD) software, OpenFOAM, following the guidance provided by thewind company ENERCON that aims to make use of this novel model to improvesites’ wind-field predictions. After carefully implementing the model in OpenFOAM,the EARSM implementation is verified and validated by testing it with a stratifiedCouette flow case. READ MORE