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Numerical FEM models for the planning of magnetic induction hyperthermia treatments with nanoparticles
No full textA numerical FEM model of a magnetic fluid
hyperthermia (MFH) treatment on an hepatocellular carcinoma
(HCC) metastasis has been simulated. Starting from actual CT
images of the patient, a 3D geometry of the anatomical district
has been reconstructed and a coupled electromagnetic and
thermal transient analysis has been performed, in order to
predict the temperature distribution at the end of the treatment.
The in vivo effect of blood perfusion has also been implemented
through the Pennes’s model. Various simulations have been
carried out, based on different particle sizes and concentrations,
as well as different exciting field intensities
Induction hardening of components for the aerospace industry
Full text linkInduction heating has been widely used for heat treating and especially surface hardening in a broad variety of applications, ranging from the automotive to the renewable energy market. However, the lack of precise knowledge about the interrelation between all the concurrent physical phenomena occurring within the part during the heating cycle has restricted its use to mass-production items (mostly gears). The benets of this technology, which is clean, repeatable, and cost-eective, could boost its introduction into more conservative industry sectors, such as aerospace, where furnace-based treatments (e.g., carburizing) represent the golden standard. The major limitation is related to the optimization of the induction hardening process, which usually requires signicant material know-how and can thus be very long and expensive. Computer simulation could provide a general tool for understanding and improving the critical aspects of each step of the process, thus speeding up the preading of the induction technology into new markets.Il riscaldamento a induzione è stato diffusamente impiegato nel settore dei trattamenti termici di componenti per i settori automobilistico ed eolico, in particolare per la tempra di indurimento in una varietà di applicazioni. I principali vantaggi legati all'utilizzo di questa tecnologia risiedono nell'elevato grado di ripetibilità ottenibile nel prodotto trattato, unitamente alla elevata velocità ed automazione di trattamento, fattori entrambi in grado di garantire una produzione efficiente e dal ridotto impatto ambientale. Tuttavia, a causa degli elevati requisiti di qualità del prodotto nito e dei ristretti quantitativi prodotti, alcuni settori industriali rimangono ancor oggi legati ai tradizionali processi di cementazione in forno, che risultano piuttosto dispendiosi per la lunga durata del trattamento termico ed il numero di operazioni di rettica necessarie a valle dello stesso. L'impiego di metodologie di simulazione numerica al calcolatore permette un'accurata messa a punto del processo di tempra a induzione attraverso prove sperimentali mirate, che ne consentano una rapida implementazione a nuovi settori applicativi
A first 3D numerical model for the treatment planning of hepatocellular carcinoma by magnetic fluid hyperthermia
No full textNumerical Validation of the Efficiency of Double or Dual-Frequency Radio Frequency Ablation
No full textNumerical FEM Models for the Prediction of Temperature During Superficial MW Hyperthermia Treatments
No full text
Modell FEMi per la simulazione e l'ottimizzazione dei trattamenti termici - la tempra ad induzione di ruote dentate
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Coupled Field Synthesis in Magnetic Fluid Hyperthermia
No full textIn this paper, the actual synthesis of the thermal field is proposed and solved as an inverse problem, considering a fully coupled magnetic-thermal analysis as for the direct problem. Reference is made to an air-cored inductor for magnetic fluid hyperthermia (MFH)
Multiphysics FEM Simulation of Contour Induction Hardening Process on Aeronautical Gears
No full textInduction heating has been widely used by the heat treatment industry mainly in the wind-power and automotive sectors, in particular for hardening purposes, in a broad range of applications, its main advantages being the high repeatability and easy automation of the process, both factors leading to improved manufacturing efficiency and reduced CO2 emissions. Though, traditional furnace-based case hardening treatments still represent the choice of reference when performance requirements are particularly demanding, either for the critical operating conditions or safety-related issues. The processes of CIH (Contour Induction Hardening), compared to the traditional carburizing processes, allows to reduce the deformations after heat treatment. The main purpose of these treatments, as well as increases the surface hardness of the piece, is to induce compressive stresses in the superficial layer, improving the fatigue behavior.
A multiphysics magneto-thermal simulation can be developed in order to calculate the temperature distribution in the gear, setting the input parameters such as currents, frequencies and treatment time
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