173,800 research outputs found
Maximiliano Schonfeld’s Films of the Volga Germans in Entre Ríos: About the Neoliberal Devil in Argentine Cinema
No full textThis chapter deals with Maximiliano Schonfeld’s work with and about the rurally-based Volga German community in the Argentine province, Entre Ríos. The films of the young Argentine director interlink themes of social marginality, rural setting and neoliberal critique. Utilising documentary and fictional modes, open narrative structures and enticing visuals, they draw pictures of a community in crisis. Consumer culture has begun shaping the desires of younger Volga Germans, while a concentration of capital and business in the agricultural sector threatens the existence of small-scale businesses. With reference to the shorts Esnorquel (2006), Entreluces (2006) and the feature film Germania (2012), the author argues that Schonfeld’s filmmaking is an act of resistance to the loss of community-based living and working structures in rural environments
An embedded flow simulation methodology for flow over fence simulations
No full textIn this paper, we report the development of embedding a flow simulation methodology (FSM) (Fasel HF, von Terzi DA, Sandberg RD (2006) A methodology for simulating compressible turbulent flows. J Appl Mech 3:405–412 [1]), (Weinmann M, Sandberg RD, Doolan C (2014) Tandem cylinder flow and noise predictions using a hybrid RANS/LES approach. Int. J. Heat Fluid Flow 50:263–278 [7]) region in a global Reynolds-averaged Navier-Stokes (RANS) region and its application to flow over a fence.</p
Contemporary Latin American Cinema and Resistance to Neoliberalism: Mapping the Field
No full textThis chapter investigates the relationship between neoliberalism and Latin America filmmaking from the 1990s onwards. Which impact did the privatizing of state-owned companies have on distribution and exhibition arrangements? How did narrative and aesthetic formats reflect these changes? In which way does contemporary Latin American cinema criticize but also benefit from neoliberal advancements? The author argues that there are loopholes within spaces of commodification that invite criticism and resistance. Initiatives on national, regional and pan-regional level support Latin American film and the ever-expanding funding scape offer opportunities to get film projects off the ground. Filmmakers use the subversive potential of genres to capture specifically Latin American experiences and sensibilities, reflecting on neoliberal ideology, its middle-class conventions and moral regimes
Tandem cylinder flow and noise predictions using a hybrid RANS/LES approach
No full textThe performance of a novel hybrid RANS/LES methodology for accurate flow and noise predictions of the NASA Tandem Cylinder Experiment is investigated. The proposed approach, the modified Flow Simulation Methodology (FSM), is based on scaling the turbulence viscosity and the turbulence kinetic energy dissipation rate with a damping function. This damping function consists of three individual components, a function based on the Kolmogorov length-scale ensuring correct behaviour in the direct numerical simulation (DNS) limit, a function ensuring that FSM provides the correct damping in large-eddy simulation (LES) mode, and a shielding function that forces the switch from Reynolds-Averaged Navier–Stokes (RANS) to LES to occur outside the boundary layer. The FSM is proposed for the kω-SST two-equation model (FSM-SST) and for an Explicit-Algebraic-Stress-Model (FSM-EASM), which is better suited to resolve anisotropy and non-equilibrium of the unresolved scales and the strain and rotation-rate dependent coefficients introduce a dynamic response of the model to the resolved flow field. Simulations are performed on a relatively coarse grid and the FSM data are compared with results obtained from the Scale-Adaptive-Simulation (SAS) and IDDES approaches. Acoustic predictions are obtained using an acoustic analogy approach based on Curle’s theory. The FSM-SST approach was found to predict the hydrodynamic field in very good agreement with reference data, whereas the FSM-EASM did not improve the predictions. The acoustic spectra predicted show good agreement with experimental results at various microphone positions, with some deficiencies in capturing the broadband noise levels at high Strouhal numbers
Contemporary Latin American Cinema. Resisting Neoliberalism?
No full textContemporary Latin American Cinema investigates the ways in which neoliberal measures of privatization, de-regularization and austerity introduced in Latin America during the 1990s have impacted film production and film narratives. The collection examines the relationship between economic policies and the films that depict recent transformations in many Latin American countries, demonstrating how contemporary Latin American film has not only criticized and resisted, but also benefitted from neoliberal advancements. Based on films produced in Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Mexico and Peru since 2010, the fourteen case studies illustrate neoliberalism’s effects, from big industries to small national cinemas. It also shows the new types of producers that have emerged, and the novel patterns of distribution, exhibition and consumption that shape and influence the Latin American filmscape. Through industry studies, reception analyses and close readings, this book establishes an informative and accessible text for scholars and students alike
The Mysteries of Finance and the Observation of Observers
No full textEsposito E. The Mysteries of Finance and the Observation of Observers. In: Copley C, Io D, eds. Schemas of Uncertainty. Amsterdam : Sandberg Inst.; 2022
Peliculas Escondidas
No full textHidden Treasures / Películas Escondidas (dir. Claudia Sandberg and Alejandro Areal Vélez, 11mins) is a filmic essay about ‘Chile’ DEFA films made in the 1970s and 1980s. The film includes interviews with author Antonio Skármeta and actress Irina Gallardo. Both artists lived in Germany during the 1980s and collaborated in projects with DEFA
Book Review: Theoretical Astrophysics: Volume 1: Astrophysical Processes by T. Padmanabhan
No full textC. H. Sandberg Lacy: Theoretical Astrophysics: Volume I: Astrophysical Processes by T. Padmanabha
Efficient parallel computing with a compact finite difference scheme
No full textThis paper proposes an efficient parallel computing approach based on a high-order accurate compact finite difference scheme in conjunction with a conventional domain decomposition method and MPI libraries. The proposed parallel computing approach consists of two major features: (a) a newly developed compact finite difference scheme with extended stencils containing halo points around subdomain boundaries, and (b) a predictor–corrector type implementation of a compact filter that effectively suppresses spurious errors from the subdomain boundaries. The current work employs three halo cells for the inter-node communication, based on which the coefficients of the new compact scheme at the subdomain boundaries are optimized to achieve as high level of resolution and accuracy as the interior compact scheme provides. Also, an optimal set of cut-off wavenumbers of the compact filter that minimizes spurious errors is suggested. It is shown that the level of errors from the proposed parallel calculations lies within the same order of magnitude of that from the single-domain serial calculations. The overall accuracy and linear stability of the new parallel compact differencing-filtering system are confirmed by grid convergence tests and eigenvalue analyses. The proposed approach shows a substantial improvement with respect to existing methods available
Direct numerical simulations of forced and unforced separation bubbles on an airfoil at incidence
No full textDirect numerical simulations (DNS) of laminar separation bubbles on a NACA-0012 airfoil at Re-c = 5 x 10(4) and incidence 5 degrees are presented. Initially volume forcing is introduced in order to promote transition to turbulence. After obtaining sufficient data from this forced case, the explicitly added disturbances are removed and the simulation run further. With no forcing the turbulence is observed to self-sustain, with increased turbulence intensity in the reattachment region. A comparison of the forced and unforced cases shows that the forcing improves the aerodynamic performance whilst requiring little energy input. Classical linear stability analysis is performed upon the time-averaged flow field; however no absolute instability is observed that could explain the presence of self-sustaining turbulence. Finally, a series of simplified DNS are presented that illustrate a three-dimensional absolute instability of the two-dimensional vortex shedding that occurs naturally. Three-dimensional perturbations are amplified in the braid region of developing vortices, and subsequently convected upstream by local regions of reverse flow, within which the upstream velocity magnitude greatly exceeds that of the time-average. The perturbations are convected into the braid region of the next developing vortex, where they are amplified further, hence the cycle repeats with increasing amplitude. The fact that this transition process is independent of upstream disturbances has implications for modelling separation bubbles
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