three-dimensional numerical simulation of metal flow and solidification in the multi-cavity casting moulds of automotive components

نویسندگان

a. kermanpur

sh. mahmoudi

a. hajipour

چکیده

the liquid metal flow and the solidification behaviours in a multi-cavity casting mould of two automotive cast parts were simulated in three dimensions. the commercial code, flow-3d® was used because it can track the front of the molten metal by a volume of fluid (vof) method and allows complicated parts to be modeled by the fractional area/volume obstacle representation (favor) method. the grey iron automotive components including a brake disc and a flywheel were cast using an automatic sand casting production line. for simulation analysis, the solid models of the casting, the gating system and the ceramic filter were spatially discretised in a multi-block pattern. the surface roughness and the contact angle of the mould were taken into account in the model, based on the properties of the sand mould used. the turbulent flow was simulated using the k-e turbulence model. the darcy's law was used to analyse the fluid flow throughout the ceramic filter designed in the gating system. proper boundary conditions were assigned for the model so that both the simulated filling time and the solidification time were achieved in the range of real experimental measurements. the predicted hot spot of the castings were in agreement with experiments. the verified simulation model showed that the four-cavity mould used for the flywheel part is more suitable than the three-cavity one of the brake disc, in getting a more uniform fluid flow and heat transfer conditions which causes similar cast parts in each mould. the simulated flow pattern during the mould filling of the castings showed that the first gate of the gating system was not working properly as it remains partially-filled (not pressurised) throughout the half of the filling stage, causing a possible air absorption by the melt. a smaller cross sectional area for the first gate was suggested. the present simulation model is able to analyse different casting parameters of the automatic multi-cavity sand casting process.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Three-dimensional Numerical Simulation of Metal Flow and Solidification in the Multi-cavity Casting Moulds of Automotive Components

The liquid metal flow and the solidification behaviours in a multi-cavity casting mould of two automotive cast parts were simulated in three dimensions. The commercial code, FLOW-3D® was used because it can track the front of the molten metal by a Volume of Fluid (VOF) method and allows complicated parts to be modeled by the Fractional Area/Volume Obstacle Representation (FAVOR) meth...

متن کامل

Three-dimensional numerical simulation of temperature and flow fields in a Czochralski growth of germanium

For a Czochralski growth of Ge crystal, thermal fields have been analysed numerically using the three-dimensional finite volume method (FLUENT package). The arrangement used in a real Czochralski crystal growth lab included a graphite crucible, heat shield, heating device, thermal insulation and chamber including two gas outlets. We have considered two cases for calculations, which are configur...

متن کامل

the study of bright and surface discrete cavity solitons dynamics in saturable nonlinear media

امروزه سالیتون ها بعنوان امواج جایگزیده ای که تحت شرایط خاص بدون تغییر شکل در محیط منتشر می-شوند، زمینه مطالعات گسترده ای در حوزه اپتیک غیرخطی هستند. در این راستا توجه به پدیده پراش گسسته، که بعنوان عامل پهن شدگی باریکه نوری در آرایه ای از موجبرهای جفت شده، ظاهر می گردد، ضروری است، زیرا سالیتون های گسسته از خنثی شدن پراش گسسته در این سیستم ها بوسیله عوامل غیرخطی بوجود می آیند. گسستگی سیستم عامل...

a comparative study of the theme of "marriage" in three victorian novelists: charles dickens, george eliot and thomas hardy

این تحقیق کوشیده است با انتخاب پنج رمان از میان آثار برگزیده، «چارلز دیکنز»، «جورج الیوت» و «توماس هاردی » و با رویکردی تطبیقی به بررسی درونمایه ی «ازدواج» در آثار این سه رمان نویس بزرگ دوره ی ویکتوریا بپردازد. فرضیه ی اولیه ی تحقیق این بوده است که چارلز دیکنز (1870- 1812) با زبانی شوخ و گزنده، جورج الیوت(1880- 1819) با نگاهی آموزشی–اندرزگونه و توماس هاردی(1928- 1840) با رویکردی تلخ وانتقادی به...

منابع من

با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید


عنوان ژورنال:
international journal of iron & steel society of iran

ناشر: iron & steel society of iran

ISSN 1735-4145

دوره 4

شماره 1 2007

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023