Essays about: "heat flux"

Showing result 11 - 15 of 122 essays containing the words heat flux.

1. 11. Convolution- compacted vision transformers for prediction of local wall heat flux at multiple Prandtl numbers in turbulent channel flow

   University essay from KTH/Skolan för teknikvetenskap (SCI)

   Author : Yuning Wang; [2023]
   Keywords : Turbulent flow; Heat transfer; Vision transformer; Convolutional neural network; Machine learning;

   Abstract : Predicting wall heat flux accurately in wall-bounded turbulent flows is critical fora variety of engineering applications, including thermal management systems andenergy-efficient designs. Traditional methods, which rely on expensive numericalsimulations, are hampered by increasing complexity and extremly high computationcost. READ MORE

3. 12. 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

4. 13. Investigation of Machine Learning Regression Techniques to Predict Critical Heat Flux

   University essay from Uppsala universitet/Avdelningen för systemteknik

   Author : Emil Helmryd Grosfilley; [2022]
   Keywords : Critical Heat Flux; Machine Learning; Regression; Neural Network; nu-Support vector regression; Gaussian Process regression; Transfer Learning;

   Abstract : A unifying model for Critical Heat Flux (CHF) prediction has been elusive for over 60 years. With the release of the data utilized in the making of the 2006 Groeneveld Lookup table (LUT), by far the largest public CHF database available to date, data-driven predictions on a large variable space can be performed. READ MORE

5. 14. Axially loaded screw joints in wooden structures exposed to fire : Fire tests in furnace and numerical calculations in TASEF of different screw mounting variations

   University essay from Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

   Author : Henrik Pettersson; Emma Wiklund; [2022]
   Keywords : Fire; wood; screw joints; strength; temperature; TASEF; Brand; trä; skruvförband; bärförmåga; temperatur; TASEF;

   Abstract : To achieve sufficient stability of a structure in a fire scenario, a thorough design of joints in wooden structures are as important as the design of the construction itself. As an earlier study points out, there are no existing design method available to determine the load capacity of an axially loaded screw joint in wooden structures, which complicate the process of a thorough design of the joint in a fire scenario. READ MORE

6. 15. CFD Simulations of Velocity and Temperature Distributions of the AuraGen Axial Flux Machine

   University essay from KTH/Maskinkonstruktion (Inst.)

   Author : Huanyu Chen; [2022]
   Keywords : CFD simulation; Induction machine; Temperature distribution; Velocity distribution; CFD-simulering; Hastighetsfördelning; Induktionsmaskin; Temperaturfördelning;

   Abstract : Axial flux induction machines are attractive solutions for electric vehicle applications nowadays. Thanks to their high torque density and no need for rare-earth material for permanent magnets, axial flux induction machines are the most used electric machine type with good performance and low prices. READ MORE