Multiphysics simulation is a widely spread field, and it has many important applications in engineering and science. It allows scientists and engineers to predict certain phenomena and their effect in a precise way, such as to help in designing sophisticated products, or analyzing such natural phenomena to understand its physics and take precaution against it; for example, weather simulation as well as stress analysis simulation can both be used to predict system failure in the automotive and aerospace industry. One of the powerful tools designed for these applications is Elmer Multiphysics simulation software. It was mainly developed by CSC IT Center for Science in Finland for Glacier simulation. It has other powerful areas ranging from heat conduction to acoustics simulation. Elmer is planned to be used in crystal growth simulation by researchers from Leibniz Institute for Crystal Growth. But as any software, Elmer has limitations. But there exists other software closing these gaps. So our goal is to couple Elmer with different solvers; that is where the power of preCICE coupling library comes in. preCICE is a coupling library which provides an API that allows users to couple different solvers for solving multiphysics problems by splitting them up into different parts of the domain. Furthermore, it allows the user to steer the simulation and exchange data between the solvers, but in order to use any solver with preCICE, an adapter must be developed for the intended solver. The aim of this thesis is to develop an Elmer adapter for the preCICE coupling library.