This paper reports on a study concerned with the numerical simulation of dough mixing that arises in the food processing industry. The flows considered are in a complex domain setting. Two dough mixers at various rotation speeds are studied; one with one stirrer and the other with two stirrers. Numerical simulations are based on three dimensions in the cylindrical polar co-ordinates system. The...

This paper describes calibration techniques for downconversion mixers used in integrated direct-conversion receivers. A method of achieving a high even-order intermodulation rejection is presented. Using the method presented, the receiver second-order input intercept point (IIP2) can always be improved by more than 20 dB. The minimum achieved receiver IIP2 after calibration is +38 dBm. A techni...

BACKGROUND AND OBJECTIVES We investigated the mixing capacity of two whole blood (WB) collection mixers. MATERIALS AND METHODS WB was simulated by using a 25% glycerol solution warmed to 35 degrees C. Citrate-phosphate-dextrose (CPD) anticoagulant of a collection system was stained with toluidine blue, and simulated WB was added at 30, 60 or 90 ml/min, respectively (n = 3 per flow speed). The...

A wireless sensor server is developed based on a reconfigurable active smart-antenna/retrodirective array. The system can serve as both a retrodirective array transponder and a smart-antenna receiver simply by changing the frequency of the local oscillator applied to the mixers, enabling it to best utilize its hardware to suit its communication environment. When operating as a direct-conversion...

Two arrow-shaped micro-mixers, obtained from the classical T-shaped geometry by tilting downward inlet channels, are considered herein. The two configurations, having different angle values, have been chosen since they show significantly flow topologies and mixing performances at low Reynolds numbers. In present paper, we use both experimental visualizations direct numerical simulations to shed...