DEVELOPMENT OF STATIC MIXERS FOR MISCIBLE FLUIDS IN LAMINAR FLOW WITH THE USE OF COMPUTATIONAL FLUID DYNAMICS (CFD)

Static mixers with improved performance were developed from CFD simulations in a stepwise approach. The relevant geometric features of simple mixer designs and the corresponding mixing mechanisms-laminar shear, elongational flow, and distributive mixing-were identified first. This information was used to formulate guidelines for the development of new geometries. The solid elements of the static mixer should: (a) provide restrictions to the flow; (b) deflect the flow; (c) be sequentially rotated around the flow direction to provide symmetry; (d) extend from the center of the pipe to the vicinity of the walls to avoid short-circuiting; and (e) distribute and remix the flow. Based on these guidelines, two improved mixer designs were developed: the DS A-I mixer has a good mixing efficiency and an acceptable pressure drop; the Fins 35 degrees mixer is more efficient and compact, but requires a larger pressure drop. Their performance indicates that their use is possible on industrial applications

Development of static mixers for miscible fluids in laminar flow with the use of computational fluid dynamics (CFD)

Static mixers with improved performance were developed from CFD simulations in a stepwise approach. The relevant geometric features of simple mixer designs and the corresponding mixing mechanisms—laminar shear, elongational flow, and distributive mixing—were identified first. This information was used to formulate guidelines for the development of new geometries. The solid elements of the static mixer should: (a) provide restrictions to the flow; (b) deflect the flow; (c) be sequentially rotated around the flow direction to provide symmetry; (d) extend from the center of the pipe to the vicinity of the walls to avoid short‐circuiting; and (e) distribute and remix the flow. Based on these guidelines, two improved mixer designs were developed: the DS A–I mixer has a good mixing efficiency and an acceptable pressure drop; the Fins 35° mixer is more efficient and compact, but requires a larger pressure drop. Their performance indicates that their use is possible on industrial applications894734744sem informaçãosem informaçã

CAPTURING AND CO-CREATING STUDENT EXPERIENCES IN SOCIAL MEDIA: A SOCIAL IDENTITY THEORY PERSPECTIVE

Drawing on social identity theory (SIT), this research investigates the role of university content strategies on student experiences in social media brand communities (SMBCs). A netnography of a university’s SMBCs sought to grasp the influences of identity cues, narratives, and marketer traits on member reactions. It was revealed that social media content plays an important sensegiving role in meeting members’ need to understand themselves, feel distinctive and positive about themselves, and feel supported and connected. The findings contribute to our understanding of the social media marketing phenomenon and inspire practice in the design of meaningful customer experiences in social media.</p