Oldroyd b comsol tutorial pdf

Comsol is the developer of comsol multiphysics software, an interactive environment for modeling and simulating scientific and engineering problems. Implementation of the logconformation formulation for two. How to build 3d objects from 2d geometries in comsol. In the windows operating system, you can also run comsol applications by connecting to a comsol server with an easytoinstall. Calculating the dissipation in uid dampers with nonnewtonian uid models a. Comsol series non newtonian fluid modeling in comsol. Furthermore, this example may also be defined and modeled using components. Forberger september 4, 2015 abstract present paper gives a comparison of the maxwell, upperconvected maxwell and the oldroyd b model for the calculation of dissipation in high shearrate cases.

We calculate the heat conduction in a simple heat sink aluminium cooling a high voltage copper cable. Oldroydb model presents more stabilization than the ucm model in poiseuille flow, when the solvent viscosity is taken into account. I am trying to model oldroydb fluids in comsol, but there is some problems. I am trying to model oldroyd b fluids in comsol, but there is some problems. In part a of the tutorial we construct the geometry of the problem to be solved.

The code is verified for an oldroydb fluid flowing past a. Electroviscous effect of power law fluids in a slit microchannel. Fluid characterized by oldroydb model in a rectangular microchannel. I try to add extra stresses due to nonnewtonian fluid to ns equations but this will influence my convergence heavily. The result are in good agreement with experimental and simulation results published elsewhere. I have also read comsol manual pdf which models this but that pdf also ignores. As alternative we can use the already constructed geometry by applying the steps from part b. Linear stability analysis of channel flow of viscoelastic oldroydb. For steady shear flow, the oldroydb equation predicts 1. This model studies a flow of oldroyd b fluid past a cylinder between two parallel plates. Note that while comsol employees may participate in the discussion forum, comsol software users who are onsubscription should submit their questions via the support center for a more comprehensive response from the technical support team. Useage of viscodampers in the automotive industry is the most common. Flow of oldroydb viscoelastic fluid comsol multiphysics.

Introduction flow around a sphere in cylindrical tubes filled with both purely viscous and viscoelastic liquids is of practical and fundamental interest. Full text views reflects the number of pdf downloads, pdfs sent to. These release notes provide information regarding new functionality in. Stabilised finite element modelling of oldroydb viscoelastic flows. How to survive alone in the wilderness for 1 week eastern woodlands duration. Comsol, comsol multiphysics, capture the concept, comsol desktop, and livelink are either registered trademarks or. Calculating the dissipation in uid dampers with non. The oldroyd b model defines viscoelastic fluid behavior. In a benchmark model of an oldroyd b fluid, the comsol multiphysics software and addon cfd module are used to solve the numerical model, the results of which have been validated by published research. It also provides a quick introduction to creating applications using the application builder. Structural optimization of nonnewtonian microfluidics dtu orbit. Electroviscous effect of power law fluids in a slit microchannel with.