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Biomedical Engineering
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Blood Vessel
This model refers to a portion of the vascular system of a young child - the upper part of the aorta artery. The blood vessels are embedded in a biological tissue (the cardiac muscle) and, during the flow of blood, pressure is applied to the internal surfaces producing deformation of the vessel wall...
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A Transient Analysis of Freeze-drying
Freeze-drying, or lyophilization, is a process for drying heat-sensitive substances such as foods, blood plasma, and antibiotics. The wet substance is frozen and then through sublimation ice or some other frozen solvent is removed in the presence of a high vacuum.
This example models the process...
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FSI in a Peristaltic Pump
In a peristaltic pump, rotating rollers squeeze a flexible tube. As the rollers move along the tube, the fluid in the tube follows the motion. The main advantage of the peristaltic pump is that no seals, valves or other internal parts ever touch the fluid. Due to their cleanliness, peristaltic pumps...
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Absorbed Radiation (SAR value) in a Human Head
The increasing use of wireless equipment has also increased the amount of radiation energy to which human bodies are exposed. A common property that measures absorbed energy is the SAR value, (specific absorption rate) to determine the amount of radiation that human tissue absorbs.
The human head...
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Magnetic Drug Targeting
Current research on methods to target chemotherapy drugs in the human body includes the investigation of bio compatible magnetic nano-carrier systems, e.g., magnetic liquids such as ferrofluids. This model example investigates an external magnetic field and its interaction with blood flow containing...
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Microwave Heating of Cancer Tumor
Electromagnetic heating is ideally suited for modeling in COMSOL Multiphysics. This model shows the area of Hyperthermic Oncology but the modeling issues and techniques are generally applicable to any problem involving electromagnetic heating.
The purpose of this model is to compute the radiation...
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Laser Irradiation of a Tumor
This is a tutorial model on how to build and solve a 2D model using the Bioheat Equation application mode. The model comes from the field of medical electronics and describes how a laser beam can irradiate a cancerous tumor. The laser irradiation heats the malignant tissue sufficiently to kill the t...
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Structural Integrity of a Hip Replacement
The most common reason that people have hip-replacement surgery is due to the wearing down of the hip joint that results from osteoarthritis. Other conditions, such as rheumatoid arthritis (a chronic inflammatory disease that causes joint pain, stiffness, and swelling), avascular necrosis (loss of b...
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Pacemaker Electrode
This model illustrates the use of COMSOL Multiphysics for the modeling of ionic current distribution problems in electrolytes, in this case human tissue. The problem is exemplified on a pacemaker electrode, which actually consists of two electrodes, a cathode and an anode.
Modelled is the current...
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Electric Impedance Sensor
Electric impedance measurements are used for imaging and detection. The applications range from nondestructive testing and geophysical imaging to medical imaging. One example is to monitor the lung function of babies in neonatal intensive care. The frequency ranges from less than 1 Hz to about 1 GHz...
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