Skin fold in the transient electric field
Transient electric field strength and current density distribution in a folded skin sample placed between plate electrodes, under a voltage pulse.
Engineering Problem
How can the transient electric field strength and current distribution be computed in a folded skin sample between pulsed electrodes?
Answer
Build a plane-parallel Transient Electric Field problem for the skin-fold and electrode geometry, apply a time-dependent voltage pulse between the plate electrodes, and evaluate the field strength and current distribution in each skin layer.
Typical Applications
- Biomedical electrode folds
- Skin-electrode contact
- Electroporation electrode systems
Simulation Problem
- Problem Type
- Plane-parallel Transient Electric Field
- Geometry
- From outside in: stratum corneum 5 μm, epidermis 10 μm, dermis 700 μm, muscle 550 μm, subcutaneous tissue 495 μm, with plate electrodes above and below.
- Given
- Voltage V = 500 V, pulse duration 70 μs
- Stratum corneum: relative permittivity 10k, conductivity 0.0125 mS/m
- Epidermis and dermis: relative permittivity 1.2M, conductivity 227 mS/m
- Muscle: relative permittivity 25M, conductivity 400 mS/m
- Subcutaneous tissue: relative permittivity 10M, conductivity 20 mS/m
- Task
- Simulate the transient electric field strength and current distribution at the skin fold.
- Solution
The voltage pulse is defined with the formula 500*impulse(t, 0, 70e-6).
- Results
The evolution of the electric field strength in each skin layer over time is obtained.
