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- Crialesi-Esposito, Marco, et al.
(författare)
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FluTAS: A GPU-accelerated finite difference code for multiphase flows
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Ingår i: Computer Physics Communications. - 0010-4655 .- 1879-2944.
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Tidskriftsartikel (refereegranskat)abstract
- We present the Fluid Transport Accelerated Solver, FluTAS, a scalable GPU code for multiphase flows with thermal effects. The code solves the incompressible Navier-Stokes equation for two-fluid systems, with a direct FFT-based Poisson solver for the pressure equation. The interface between the two fluids is represented with the Volume of Fluid (VoF) method, which is mass conserving and well suited for complex flows thanks to its capacity of handling topological changes. The energy equation is explicitly solved and coupled with the momentum equation through the Boussinesq approximation. The code is conceived in a modular fashion so that different numerical methods can be used independently, the existing routines can be modified, and new ones can be included in a straightforward and sustainable manner. FluTAS is written in modern Fortran and parallelized using hybrid MPI/OpenMP in the CPU-only version and accelerated with OpenACC directives in the GPU implementation. We present different benchmarks to validate the code, and two large-scale simulations of fundamental interest in turbulent multiphase flows: isothermal emulsions in HIT and two-layer Rayleigh-Bénard convection. FluTAS is distributed through a MIT license and arises from a collaborative effort of several scientists, aiming to become a flexible tool to study complex multiphase flows.
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- Paxling, Linda
(författare)
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Exploring technology design among mobile entrepreneurs in Kampala : An open space workshop
- 2020
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Ingår i: The Electronic Journal of Information Systems in Developing Countries. - : WILEY. - 1681-4835. ; 86:2
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Tidskriftsartikel (refereegranskat)abstract
- Information and communication technologies (ICTs) are located at the center of international development and considered vital for the progress of the current sustainable development goals. ICTs are embedded in cultural structures and social norms, which provide both possibilities and challenges to the people working with technologies such as mobile phones. Drawing upon theories and methodologies of feminist and postcolonial technosciences, my research objective is an exploration of how young entrepreneurs in Uganda affect and are affected by technology design. This article is based on conversations from an Open space workshop that took place at a tech hub in Kampala in 2012. The theme of the workshop was "The mobile futures of Uganda: sharing visions and challenges for today and tomorrow." The workshop discussions showcase how norms and values are embedded in technology design and how colonial relationships still linger and affect contemporary design and technology practices. Together with my empirical material, I perform technoscientific stories that discuss challenges in entrepreneurship, working in software development and user design practices. I argue that studying the social and political dimensions of technology design is crucial for forming more inclusive and heterogeneous ICT practices.
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