ΜΕΛΕΤΗ ΔΑΚΤΥΛΙΟΕΙΔΟΥΣ ΔΙΦΑΣΙΚΗΣ ΡΟΗΣ ΣΕ ΟΡΙΖΟΝΤΙΟ ΑΓΩΓΟ

TIME RECORDS HAVE BEEN COLLECTED OF LOCAL LIQUID FILM THICKNESS, USING PARALLELWIRE CONDUCTANCE PROBES, IN A NEW 50.8 MM I.D. PIPE LOOP. STATISTICAL ANALYSISOF THESE RECORDS ALLOWS THE STUDY OF CIRCUMFERENTIAL VARIATION OF TIME-AVERAGED THICKNESS AND OF OTHER QUANTITIES. THE POWER SPECTRA SHOW THAT THE DOMINANT FREQUENCY ASSOCIATED WITH LARGE WAVES IS <10 HZ AT LOW GAS VELOCITIES, DISPLAYING A TENDENCY TO INCREASE WITH GAS FLOW RATE. BY COMBINING SIGNAL CROSS-CORRELATION DATA WITH VISUAL OBSERVATIONS, IT IS SHOWN THAT THE DISTURBANCE WAVES TEND TO DEFORM RAPIDLY, MOVE ON A PLANE INCLINED WITH RESPECT TO THE VERTICAL, AND COVER AN INCREASINGLY LARGER PORTION OF THE CIRCUMFERENCE WITH INCREASING GAS VELOCITY. THE MEAN LARGE WAVE HEIGHT AT THE PIPE BOTTOM IS LINEARLY RELATED TO THE LOCAL RMS VALUE. IT IS ALSO A STRONG FUNCTION OF GAS FLOW RATE, WITH A MODERATE DEPENDENCE ON LIQUID FLOW RATE. HOWEVER, THE DISTURBANCE WAVE INTERMITTENCY APPEARS TO BE ALMOST INDEPENDENT OF GAS AS WELL AS LIQUID FLOW RATES. (SHORTENED)

Grantor dc:publisher

Aristotle University Of Thessaloniki (AUTH)

Year dc:date

1991

Authors dc:creator

• Παράς, Σπυρίδων
• Paras, Spyridon

• LDA (ΑΝΕΜΟΜΕΤΡΙΑ LASER DOPPLAR)
• ΔΑΚΤΥΛΙΟΕΙΔΗΣ ΡΟΗ
• Ροές
• ΚΑΤΑΝΟΜΗ ΣΤΑΓΟΝΙΔΙΩΝ
• ΚΥΜΑΤΑ ΔΙΑΤΑΡΑΧΗΣ
• ΛΕΠΤΕΣ ΣΤΟΙΒΑΔΕΣ
• ΡΟΗ ΥΓΡΟΥ/ΑΕΡΙΟΥ
• ΡΥΘΜΟΣ ΕΝΑΠΟΘΕΣΗΣ
• ΣΥΜΠΑΡΑΣΥΡΜΟΣ
• ΤΟΠΙΚΕΣ ΤΑΧΥΤΗΤΕΣ
• ANNULAR FLOW
• DEPOSITION RATES
• DISTURBANCE WAVES
• DROPLET DISTRIBUTION
• ENTRAINMENT
• FILM PROPERTIES
• GAS-LIQUID FLOW
• LDA
• LOCAL VELOCITY
• Thin films
• Επιστήμες Μηχανικού και Τεχνολογία
• Επιστήμη Χημικού Μηχανικού
• Engineering and Technology
• Chemical Engineering

Language dc:language

gre

Identifier

10.12681/eadd/1708

OAI identifier oai:identifier

oai:10442/1708