Bruno Souza Carmo

Bruno Souza Carmo
University of São Paulo | USP · Departamento de Engenharia Mecânica (PME) (POLI)

Dr

About

87
Publications
16,670
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
802
Citations
Introduction
My areas of expertise are fluid mechanics and energy, and I am currently working on projects and supervising students in the following research lines: hydrodynamic stability, fluid-structure interaction, CFD-based optimization, high-order finite element methods, renewable energy (wind, tidal and biomass), biological flows, hybrid power systems, fuel cells, gas purification and computational geophysics.
Additional affiliations
October 2013 - May 2020
University of São Paulo
Position
  • Professor (Assistant)
October 2010 - October 2013
University of São Paulo
Position
  • Professor (Assistant)
July 2010 - October 2010
University of São Paulo
Position
  • Professor (Assistant)
Education
September 2009 - July 2010
University of São Paulo
Field of study
  • Post-doctorate in Mechanical Engineering
September 2005 - August 2009
Imperial College London
Field of study
  • Aeronautics
February 2003 - May 2005
University of São Paulo
Field of study
  • MSc in Mechanical Engineering

Publications

Publications (87)
Article
Floating offshore wind turbines (FOWTs) are subjected to platform motion induced by wind and wave loads. The oscillatory movement trigger vortex instabilities, modifying the wake structure, influencing the flow reaching downstream wind turbines. In this work, the wake of a FOWT is analysed by means of numerical simulations and comparison with linea...
Article
Full-text available
We evaluate the accuracy of the actuator line model (ALM) approach by performing simulations for the NREL 5‐MW wind turbine in uniform inflow using three large eddy simulation codes. The power and thrust coefficients obtained using the three codes agree within 1% when the grid spacing Δgrid≤5.25 m and are cross‐validated against blade element momen...
Article
This paper presents a blade-resolved numerical investigation of the NREL 5 MW baseline wind turbine for offshore applications including blade-tower interference, analyzing the solver configuration and its influence on the results accuracy and computational costs. The wind turbine was analyzed considering its full dimensions under the operating cond...
Preprint
Floating offshore wind turbines (FOWTs) are subjected to platform motion induced by wind and wave loads. The oscillatory movement trigger vortex instabilities, modifying the wake structure, influencing the flow reaching downstream wind turbines. In this work, the wake of a FOWT is analysed by means of numerical simulations and comparison with linea...
Article
Full-text available
The main objective of this paper is to select the optimal configuration of a ship’s power system, considering the use of fuel cells and batteries, that would achieve the lowest CO2 emissions also taking into consideration the number of battery cycles. The ship analyzed in this work is a Platform Supply Vessel (PSV) used to support oil and gas offsh...
Preprint
Full-text available
We evaluate the accuracy of the actuator line model (ALM) approach by performing simulations for the NREL~5~MW wind turbine in uniform inflow using three large eddy simulation codes. The power and thrust coefficients obtained using the three codes agrees within $1\%$ when the grid spacing $\Delta_{\rm grid} \le 5.25$~m, and are cross-validated agai...
Preprint
Full-text available
In this article, we introduce spyro, a software stack to solve acoustic wave propagation in heterogeneous domains and perform full waveform inversion (FWI) employing the finite element framework from Firedrake, a high-level Python package for the automated solution of partial differential equations using the finite element method. The capability of...
Preprint
Full-text available
In this paper, a methodology to calculate the sensitivity of the least stable modes of fluid-structure interaction systems with respect to local forces is presented. We make use of the adjoint equations of the flow-structure coupled system to calculate the gradients, and the algorithms were implemented using the spectral/\emph{hp} element method fo...
Article
Wind turbines suffer with the degradation of blades during their working life as a result of weathering or adhesion of dirt on their surface. This decreases efficiency in the energy production, requiring in some cases the exchange, repair or cleaning of the blades surfaces, which causes a decrease in the capacity factor of the wind farm due to the...
Preprint
Full-text available
In this article, continuous Galerkin finite elements are applied to perform full waveform inversion (FWI) for seismic velocity model building. A time-domain FWI approach is detailed that uses meshes composed of variably sized triangular elements to discretize the domain. To resolve both the forward and adjoint-state equations, and to calculate a me...
Article
RocketPy is a new open-source Python library specialized in trajectory simulations of sounding rockets and high-powered rockets. Having a modular structure and being built on top of a six degree-of-freedom flight dynamics model that includes detailed mass variation effects, RocketPy allows for accurate trajectory prediction of different rocket conf...
Article
This paper discusses different aspects of an active flexible filament propulsion in a liquid medium. The immersed boundary method is used to model a flexible filament immersed in Newtonian fluid at low Reynolds numbers. The flexible filament motion emulates that of a C. elegans. We varied some parameters of the filament motion, such as the interpol...
Article
This work explores an alternative approach to computing sensitivity (derivatives) of functionals with respect to a broader range of control parameters in fluid flow problems. It builds upon the complementary character of the boundary problems that underlie the flow and the corresponding adjoint equations. Such complementarity is used to ensure well...
Article
Full-text available
This study investigates the relationship between collective motion and propulsion of bacterial consortia and their biopolymer production efficiency. Rheological tests were conducted for suspensions of two different methanotrophic bacterial consortia obtained after enrichment of sediment samples from mangrove sites in Brazil. We considered the linea...
Article
This work shows the development of a tool for wind farm layout optimization based on computational fluid dynamics (CFD) simulations of the atmospheric wind flow and inter-turbine interference. Due to the high computational power required to simulate a whole wind farm using the complete geometry of the wind turbines, simplified models were developed...
Chapter
Full-text available
Erosion wear is the loss of mass on the surface of a solid body in contact with a moving fluid. When the fluid under study has solid particulate material or sediments, the erosion could be significant (Kulu and Kleis, Solid particle erosion: occurrence, prediction and control. Springer, London, 2008; Karimi and Schmid, Wear 156(1):33–47, 1992). Sev...
Article
Full-text available
We investigate experimentally the rheology of an active suspension of nematodes C. elegans under oscillatory shear. There are few experimental investigations and theoretical work on the oscillatory rheological properties including elastic and viscous moduli of micro-swimmer suspensions. The viscous and elastic moduli are evaluated by our experiment...
Article
Concerns about energy production and climate change are driving transitions towards renewable electricity sources around the world. Tidal stream energy has been identified as an energy source with potential as both a renewable and predictable resource, particularly in regions with established offshore industries. Tidal stream technology is at a rel...
Article
The nonlinear character of the primary bifurcation is investigated for the flow around a flexibly-mounted circular cylinder. We have considered the cases in which the cylinder can oscillate in the transverse direction only and in both transverse and in-line directions. Low and high values of mass ratio ($m^{\ast} = 5$ and 50) were studied, and redu...
Conference Paper
This paper aims at investigating the CO2 emission, the fuel consumption, the energy contribution and the time connection of each generator in standards routes of a Platform Supply Vessel (PSV) using direct-current (DC) distribution system. Since the majority of the PSVs work with AC distribution grids, in this paper we trace a comparison between bo...
Article
Results are reported from linear and nonlinear stability analyses of pulsatile flow in a straight channel with a smooth constriction with 50 % occlusion. Physical mechanisms based on the energy variation of the two-dimensional modes are proposed to elucidate the equilibrium states and changes in the flow-field behaviour. When investigating how the...
Article
Full-text available
Greenhouse gas emissions are one of the most critical worldwide concerns, and multiple efforts are being proposed to reduce these emissions. Shipping represents around 2% of global CO 2 emissions. Since ship power systems have a high dependence on fossil fuels, hybrid systems using diesel generators and batteries are becoming an interesting solutio...
Conference Paper
Full-text available
Wind energy is one of the most studied topics in the renewable energy scenario. In the last decades, the focus has been put on several aspects of modeling and analysis of onshore wind turbines. Particularly in Brazil, onshore wind energy has an enormous potential that has been investigated in some recent studies. In turn, floating offshore wind tur...
Conference Paper
The reduction of CO 2 emissions from vessels gain relevance after European regulations became more rigorous, monitoring and checking CO 2 emissions in European Union (EU) ports. Based on these concerns, this work aims to study strategies to include lithium-ion batteries in a Platform Supply Vessel (PSV) diesel-electric system. Regarding the differe...
Article
Stability and nonlinear analyses were employed to study symmetric and asymmetric steady flows through a straight channel with a smooth constriction with 50 % occlusion. Linear stability analysis was carried out to determine the unstable regions and the critical Reynolds numbers for the primary and secondary global instabilities. The primary bifurca...
Conference Paper
Full-text available
Calculations of sensitivities for a flow around spring-mounted cylinder free to oscillate in the cross stream direction are introduced. In this work, the state vector of the fluid-structure interaction (FSI) problem is given by a base flow plus a perturbation, in which the base flow is steady and the displacement of the cylinder is given by a pertu...
Conference Paper
Full-text available
Wind turbine blades are subjected to oscillatory loads due their rotation. The gravity compresses or tensions the blade depending on its position along the cycle. Due to sheared flow, the wind load also changes in a cyclic way as the blade rotates. This kind of load can lead to fatigue damage. It is possible to analyse some of the fundamentals of t...
Article
The lattice Boltzmann method (LBM) is applied to simulate the complete three-dimensional transient flow and noise generated on the Advanced Noise Control Fan (ANCF) geometry. The ANCF is a model developed by NASA Glenn composed by a rotor–stator system enclosed by a duct. The experimental noise spectra provided by NASA at 30 microphones around the...
Article
Computational aeroacoustics simulations require a considerable amount of time, which makes the comparison of a large number of different geometric designs a difficult task. The goal of the present study were to provide a suitable methodology for aeroacoustic optimization. By means of numerical analyses using commercial computational fluid dynamics...
Conference Paper
Full-text available
The aim of this project is to study the physics of the phenomena occurring inside a CO2 /CH4 supersonic separator by means of 3D numerical simulations focusing on the different options for design and their role on some important flow parameters, like shock wave position and swirl intensity. Besides that, we also implemented a genetic algorithm to o...
Conference Paper
Full-text available
The purpose of the current study is to analyze the flow in a supersonic nozzle with the objective of better understanding of the flow in different configurations. To achieve this understanding, numerical simulations were carried out using computational fluid dynamics (CFD) in order to quickly inspect the behavior of the flow and make conclusions ba...
Article
This paper presents the modeling, simulation and optimization of a single channel proton exchange membrane fuel cell (PEMFC) using computational fluid dynamics methods. The shape optimization of the flow-channels was employed to improve the electrical performance of the fuel cell. The maximization of the current density was the objective function o...
Article
Full-text available
This work presents theoretical and experimental analyses on the kinematics-wave motion of suspended active particles in a biological fluid. The fluid is an active suspension of nematodes immersed in a gel-like biological structure, moving at a low Reynolds number. The nematode chosen for the study is Caenorhabditis elegans. Its motion is subjected...
Conference Paper
The environmental footprint of ships is on the highlights of the maritime industry to make it moves to a greener future. Recently, European regulation starts to be more severe with the monitoring, reporting and verification of CO 2 emissions from large ships using that are using EU ports. The use of fossil fuels to generate power to ships is in che...
Conference Paper
Full-text available
In this work we took the first steps to create a model to simulate the diaphragm and mitral valve based on special boundary conditions. The pneumatic 35 cc InCor pediatric ventricular assist device (PVAD) was operated at rates of 120 bpm, 90 bpm and 60 bpm with a fixed diastolic duration of 2/3 of the cardiac cycle time to understand the difference...
Article
Full-text available
A three-dimensional direct stability analysis of the flow in a straight channel with a smooth constriction with 50% occlusion is performed. Two-dimensional steady and long-period pulsatile flows are investigated with respect to instabilities and transition to turbulence. The steady base flow is asymmetric for the Reynolds number range considered in...
Conference Paper
Full-text available
A computational fluid dynamics model is developed to assess the performance of a 35 cc pediatric ventricular assist device. In order to improve the hydrodynamics performance of the device and proposing changes in its design. Computational analyses was carried out for steady and pulsatile flows. Flow patterns, velocity fields and wall shear stresses...
Conference Paper
Full-text available
This work focuses on the application of the adjoint method to pediatric ventricular assist device (PVAD), in order to develop an optimization methodology capable of improving its performance. Equally important is the capability to compute sensitivity derivatives of relevant measures of merit with respect to operational parameters. On following the...
Chapter
Helical strakes are the most employed devices to mitigate or suppress vortex-induced vibrations of circular cylinders. Although several investigations have been performed in order to predict the performance of these devices, proving its efficiency in specific configurations, little is understood regarding the physical mechanisms leading to the effi...
Article
A simple way to decrease the drag and oscillating lift forces in the flow around a circular cylinder consists of positioning splitter plates in the wake of the flow. In ourwork, a geometry consisting of two splitter plates placed close to a circular cylinder was studied. The length of the splitter plates is equal to the cylinder diameter and they a...
Chapter
Full-text available
The purpose is to simulate numerically the flow and noise on the Advanced Noise Control Fan (ANCF). The ANCF model was developed by the NASA Glenn Research Center to provide measurement data of a turbofan flow and its corresponding generated noise. The aim of the numerical simulations is to predict accurately the tonal noise as well as the broadban...
Article
A simple way to decrease the drag and oscillating lift forces in the flow around a circular cylinder consists of positioning a splitter plate in the wake, parallel to the flow. In this paper, the effect of the splitter plate on the wake dynamics, more specifically on the wake transition, is described in detail. First, two-dimensional and three-dime...
Conference Paper
Full-text available
The purpose is to simulate numerically the flow and noise on the Advanced Noise Control Fan (ANCF). The ANCF model was developed by the NASA Glenn Research Center to provide measurement data of a turbofan flow and its corresponding generated noise. The aim of the numerical simulations is to predict accurately the tonal noise as well as the broadban...
Conference Paper
Full-text available
Helical strakes are the most employed devices to mitigate or suppress vortex shedding behind circular cylinders. Although several investigations have been performed in order to predict the performance of these devices, proving its effciency in specific configurations, little is understood regarding the physical mechanisms leading to the effciency o...
Article
Full-text available
When a pair of tandem cylinders is immersed in a flow the downstream cylinder can be excited into wake-induced vibrations (WIV) due to the interaction with vortices coming from the upstream cylinder. G. R. S. Assi, P. W. Bearman and J. R. Meneghini [J. Fluid Mech. 661, 365–401 (2010; Zbl 1205.76004)] concluded that the WIV excitation mechanism has...
Conference Paper
Two- and three-dimensional simulations of the flow around straked cylinders are presented. For the two-dimensional simulations we used the Spectral/hp Element Method, and carried out simulations for five different angles of rotation of the cylinder with respect to the free stream. Fixed and elastically-mounted cylinders were tested, and the Reynold...
Article
We simulate the incompressible, viscous flow over a two-dimensional NACA0012 airfoil oscillating in heave at mean incidences 12°<α¯<20° and Reynolds numbers 800 ⩽ Re ⩽ 104. The two-dimensional Navier–Stokes equations are solved using a Spectral/hp Element Method for the spatial discretization and a high-order splitting scheme for the evolution in t...