Sökning: "helical"

Visar resultat 1 - 5 av 37 uppsatser innehållade ordet helical.

  1. 1. Experimental validation of a periodic heat transfer CFD model of a vertical shell and tube heat exchanger

    Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)

    Författare :Patrik Bengtsson; Dilip Kumar Vellore Saikumar; [2019]
    Nyckelord :;

    Sammanfattning : Flow obstructions are used as a passive design element in heat exchangers to enhance heattransfer. Further, a change in flow structure can also have a positive effect on the heat transfer. Avertical shell and tube heat exchanger, used to recover heat in the greywater stream, isinvestigated in this study. LÄS MER

  2. 2. Helical Magnetic Fields in the FEMIC Code for RF Heating of Fusion Plasmas

    Master-uppsats, KTH/Tillämpad fysik

    Författare :Henrik Järleblad; [2019]
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  3. 3. A Novel and an Efficient Design of an Inverted F-Antenna for Bluetooth Low Energy Communications

    Magister-uppsats, Högskolan i Halmstad/Akademin för informationsteknologi

    Författare :Amer Khatib; [2019]
    Nyckelord :Antenna; Communication; design; testing; Wireless communications; bluetooth.;

    Sammanfattning : Constantly, antenna plays an important role in expanding the wireless communication systems in different technology applications for example, but not limited to, IoT communications and automotive radar systems. On the other hand, the Bluetooth-Low-Energy (BLE) benefits different sorts of applications, as it offers (i) a very low power consumption, (ii) a very fast data transfer, (iii) and an inexpensive/efficient solution as well. LÄS MER

  4. 4. Study of Gear design Concept to Reduce Root Bending- & Contact Stresses for Automotive Transmission

    Master-uppsats, Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)

    Författare :Felicia Li; [2019]
    Nyckelord :Helical gears; transmission error TE; root bending stress; contact stress; WindowsLDP; Abaqus 2017; ANSA; META; spiralformade kugghjul; Överföringsfelet TE; rotspänning; kontaktspänning; WindowsLDP; Abaqus 2017; ANSA; META;

    Sammanfattning : Advanced technologies for the automotive industry require improved designed precision in different areas. Research is needed in order to meet customer demand and satisfaction to increase durability, efficiency, and reliability. That is why continuous development in transmission system has been an exciting topic for many years. LÄS MER

  5. 5. Investigation of magnetic order in nickel-5d transition metal systems

    Master-uppsats, Uppsala universitet/Molekyl- och kondenserade materiens fysik

    Författare :Konstantinos Papadopoulos; [2019]
    Nyckelord :muSR; muons; skyrmions; magnetism; transition; spin; rotation; relaxation; resonance; thin; films; transition; metals; MBE; sputtering; XRR; reflectivity; molecular; beam; epitaxy; x; ray; TRIUMF; double; perovskite; longitudinal; transverse; nickel; Ni; asymmetry; positron; depolarization; chiral; lattice; helical; DM; interaction;

    Sammanfattning : Double perovskite materials exhibit alterations in magnetic order through manipulation oftheir crystal structure. Certain ultra thin metallic bilayers can create an exotic magnetic stateof confined spin textures called skyrmions. In both cases, new atomic arrangements leadto new electrical and magnetic properties. LÄS MER