title: Surrogate modeling a computational fluid dynamics-based wind turbine wake simulation using machine learning

authors: Wilson, Brett

subjects: computer science

abstract: The Wind Farm Layout Optimization problem involves finding the optimal positions for wind turbines on a wind farm site. Current Metahueristic based methods make use of a combination of turbine specifications and parameters, mathematical models and empirically produced power production equations to estimate the energy output of a real wind farm [15]. The overarching variable in any optimisation function is wind speed - this is what used to determine the power generated. Therefore, accurate predictions of wind speeds at specific points across the volume of the site are needed. In this paper, Computational Fluid Dynamics (CFD) was used to simulate a full scale rotating wind turbine blade with fluid (air) at various wind speeds flowing past the turbine. The wake effect can be observed and leads to decrease in wind speeds, as expected. Wind speed at specific x,y and z (3D) coordinates were sampled and used as input to common Machine Learning regression algorithms to create different surrogate models. This was needed as each individual CFD experiment takes approximately 8 hours to complete, so it is not feasible to continuously repeat these simulations inside a metaheuristic optimiser.

text: Surrogate modeling a computational fluid dynamics-based wind turbine wake simulation using machine learning The Wind Farm Layout Optimization problem involves finding the optimal positions for wind turbines on a wind farm site. Current Metahueristic based methods make use of a combination of turbine specifications and parameters, mathematical models and empirically produced power production equations to estimate the energy output of a real wind farm [15]. The overarching variable in any optimisation function is wind speed - this is what used to determine the power generated. Therefore, accurate predictions of wind speeds at specific points across the volume of the site are needed. In this paper, Computational Fluid Dynamics (CFD) was used to simulate a full scale rotating wind turbine blade with fluid (air) at various wind speeds flowing past the turbine. The wake effect can be observed and leads to decrease in wind speeds, as expected. Wind speed at specific x,y and z (3D) coordinates were sampled and used as input to common Machine Learning regression algorithms to create different surrogate models. This was needed as each individual CFD experiment takes approximately 8 hours to complete, so it is not feasible to continuously repeat these simulations inside a metaheuristic optimiser.

year: 2017

title: The effects of promotional content on the nutritional quality of children’s breakfast cereals from Australia, New Zealand, the United Kingdom , Canada and the United States.

authors: Chepulis, Lynne Merran

abstract: Breakfast is considered to be an essential meal for children, offering valuable nutrition for growing bodies. However, the nutritional value of pre-packaged children’s cereals has been questioned recently, particularly as reduced nutritional quality can contribute to childhood obesity.

text: The effects of promotional content on the nutritional quality of children’s breakfast cereals from Australia, New Zealand, the United Kingdom , Canada and the United States. Breakfast is considered to be an essential meal for children, offering valuable nutrition for growing bodies. However, the nutritional value of pre-packaged children’s cereals has been questioned recently, particularly as reduced nutritional quality can contribute to childhood obesity.

year: 2019

title: The shift from the third way to neo-liberalism: An analysis of the 2010 amendments to the LGA

authors: Piercy, Gemma Louise

abstract: •	The New Zealand Third Way context
•	The 2002 Local Government Act (LGA)Case study: OhiwaHarbour Strategy
•	2010 and 2012 Amendments to the LGACase study: Social housing
•	Conclusion

text: The shift from the third way to neo-liberalism: An analysis of the 2010 amendments to the LGA •	The New Zealand Third Way context
•	The 2002 Local Government Act (LGA)Case study: OhiwaHarbour Strategy
•	2010 and 2012 Amendments to the LGACase study: Social housing
•	Conclusion

year: 2015