3D Simulation of transient heat transfer in human eye using finite element method

Nonlinear solution for radiation boundary condition of heat transfer process in human eye

“…The larger section at the back of the eye is filled with a colorless gelatinous mass called the vitreous humor. The smaller section in the front contains a clear, water-like material called aqueous humor [1]. …”

“…The minimum of this functional corresponds to the governing differential equation under the given boundary conditions. The approximate solution is then obtained by minimizing the functional with respect to variables that define a certain approximation to the solution [1,6]. A typical boundary-value problem can be defined by a governing differential equation in Ω domail in below: f (10) In the above equation is differential operator, f is excitation or forcing function and is unknown quantity.…”

“…A finite element method is applied to analyze the temperate distribution in a threedimensional (3D) model of the human eye. The human eye is modeled as a composition of several homogeneous regions and each region has its own physical and geometry properties [1]. For solving heat equation in human eye we face to complicated boundary condition which is named radiation boundary condition and in most of models such as transient heat transfer [1] or steady-state heat transfer modeling inside the human eye with two-dimensional (2D) and 3D models [2], this boundary condition is simplified to a robin boundary condition.…”

“…The human eye is modeled as a composition of several homogeneous regions and each region has its own physical and geometry properties [1]. For solving heat equation in human eye we face to complicated boundary condition which is named radiation boundary condition and in most of models such as transient heat transfer [1] or steady-state heat transfer modeling inside the human eye with two-dimensional (2D) and 3D models [2], this boundary condition is simplified to a robin boundary condition. In this paper, we present mathematical solution for radiation boundary condition using Ritz method in finite element method and it can help us to solve heat equation inside the human eye without modeling radiation boundary to robin boundary condition.…”

Human recognition based on retinal images and using new similarity function

“…Among all recognition methods, the only method that the users can't apply any modification for defrauding on biometric characteristic even after death is retinal recognition. Because retina is the innermost layer in the eye and two-dimensional images of visual objects are created on retina [3], [4] and there is not accessibility for people to change the pattern of retinal vessels which are the main biometric characteristic used for recognition. Depending on the application context, a biometric system may operate either in verification mode or identification mode.…”