پديد آورنده :
احمري، هادي
عنوان :
بررسي رفتار الكتروئولوژيكي نانو سيالات
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
مهندسي شيمي
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مهندسي شيمي
صفحه شمار :
چهارده، 107، [II]ص.: مصور، جدول، نمودار
يادداشت :
ص. ع. به فارسي و انگليسي
استاد راهنما :
غلامرضا اعتماد
توصيفگر ها :
كرنش , خواص رئولوژيكي , اولتراسوند
تاريخ نمايه سازي :
02/02/1387
استاد داور :
محسن نصر اصفهاني، محمود معصومي
تاريخ ورود اطلاعات :
1396/03/08
رشته تحصيلي :
مهندسي شيمي
چكيده فارسي :
به فارسي و انگليسي: قابل رؤيت در نسخه ديجيتال
چكيده انگليسي :
AbstractWhen the external electrical field is applied on some of fluids that contain particles e g suspensions and colloids the rheological properties of these fluids change extensively This phenomenon is applicable in many industry and experimental tasks One ofapplication of these fluids is on hydraulic valves which in absence of electrical field thevalve would remain open When electrical field is applied the apparent viscosity of fluidchanges and the valve closes Similarly in a clutch a motor driven rotor would transfer itsspin to a drive shaft through a thin layer of ER fluid The purpose of this thesis was investigation on the effect of external electrical field on ERproperties of non Newtonian fluids silicon oil with adding CuO SnO2 and Y2O3nanoprticles For this reason the suspensions of non Newtonian fluids were prepared andER properties of fluids were measured with concentric cylinder rotary rheometer To studythe effect of electrical field on rheological properties of nanofluid various electrical fieldstrength were applied The rheological properties of suspension were measured usingavailable rheometer with appropriate modification To apply electrical field the highvoltage DC equipment is used which was able to produce DC voltage In this study effect of electrical field strength concentration of CuO SnO2 and Y2O3 andeffect of simultaneousness using of CuO and Y2O3 and SnO2 and Y2O3 on ER propertiesof nanofluids were investigated Based on the results the apparent viscosity and yield stress with applying electrical fieldare enhanced Also enhancement concentration of nanoparticles increases ER properties Effect of enhancement of CuO is greater than SnO2 Utilization Y2O3 nanoparticlesincreases ER properties of nanofluids
استاد راهنما :
غلامرضا اعتماد
استاد داور :
محسن نصر اصفهاني، محمود معصومي
