Consultez les proceedings de la Conference COMSOL 2024
Axisymmetric acoustic waves propagating along buried water pipes have been investigated by FEM and experimentally. Universal dispersion relations of the fundamental mode were obtained as a function of the standard dimension ratio SDR and of the material surrounding the pipe (soil, air). ... En savoir plus
Thermocouples have been used for measurement of temperature ever since the discovery of Seebeck effect. Though the voltage output of a thermocouple is a function of the temperature difference between hot and cold junctions, the response time and the magnitude of voltage depends on the ... En savoir plus
The paper presents a method of extraction of coupling of modes (COM) parameters for a one port surface acoustic wave (SAW) resonator from the results of finite element analysis in COMSOL Multiphysics®. The COM parameters calculated are electromechanical coupling coefficient, reflection ... En savoir plus
Different configurations of MEMS based accelerometer has been made and analysed using COMSOL Multiphysics. The designs presented in this paper consist of a square shaped proof mass with flexures supporting it. Different position and varied number of supporting flexures attached to the ... En savoir plus
A sharp tip approached perpendicular to a conducting surface at subnanometer distances and biased with a small voltage builds a junction across which electrons can be transferred from the tip apex to the nearest surface atom by direct quantum mechanical tunneling. Such a junction is used ... En savoir plus
Diabetes mellitus affects 387 million people across the world according to the latest estimates of International Diabetes Foundation. Insulin is one of the major drugs required to keep the glucose level within desired limits in a diabetic patient. Insulin is generally administered to a ... En savoir plus
Ultrasonic sensors are commonly used for a wide variety of non-contact presence, proximity or distance measuring applications in industry, especially the automotive branch. This paper shows how the radiation properties of bending-type ultrasonic transducers with rotational symmetry ... En savoir plus
Precise physics experiments in space require highly stable thermal environments, especially if the experiments are targeted in earth orbits where eclipses will cast large temperature variation. We have been designing and modeling a thermal system with sub micro-kelvin stability using ... En savoir plus
Bioreactor landfill is based on a homogeneous distribution of the moisture content to increase waste biodegradation. Most of studies have shown that Electrical Resistivity Tomography (ERT) can be a suitable method to study water content variation (2D and 3D). ERT is influenced by many ... En savoir plus
In this paper, we present study on the mass loading effect of the interdigital transducer (IDT) on surface acoustic wave (SAW) velocity in SAW devices, using COMSOL Multiphysics. We have simulated a one port SAW resonator made on YZ lithium niobate substrate and investigated the ... En savoir plus