Reynolds number - 2025 ACF Fall

Question

This quantity was first introduced by George Stokes in 1851, but was named after the scientist who popularized it. For 10 points each:

[10m] What dimensionless quantity equals the ratio of inertial and viscous forces? This quantity is more than a few thousand in turbulent flow.

ANSWER: Reynolds number [or Re]

[10e] This type of flow, contrasted with turbulent flow, occurs at low Reynolds numbers. This type of fluid flow contains layers that move smoothly and experience little or no mixing.

ANSWER: laminar flow

[10h] Assuming laminar flow and this condition, the Hagen–Poiseuille (“HAH-gin pwah-ZOY”) equation gives the pressure drop of a fluid in a pipe. Water approximately obeys this condition in which the divergence of velocity equals zero.

ANSWER: incompressibility [or incompressible flow]

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Summary


Northern California	Main	Y	3	20.00	100%	67%	33%
Southern California	Main	Y	5	24.00	100%	60%	80%
Eastern Canada (1)	Main	Y	4	12.50	75%	25%	25%
Eastern Canada (2)	Main	Y	8	13.75	88%	38%	13%
Florida	Main	Y	2	15.00	100%	50%	0%
Great Lakes	Main	Y	9	22.22	100%	78%	44%
Lower Mid-Atlantic	Main	Y	8	18.75	100%	50%	38%
Upper Mid-Atlantic	Main	Y	6	16.67	83%	67%	17%
Midwest	Main	Y	9	20.00	89%	67%	44%
North	Main	Y	4	20.00	75%	50%	75%
Northeast	Main	Y	9	12.22	89%	11%	22%
Pacific	Main	Y	7	17.14	86%	43%	43%
South Central	Main	Y	4	10.00	100%	0%	0%
Southeast	Main	Y	10	17.00	100%	50%	20%
Upstate NY	Main	Y	3	20.00	100%	33%	67%

Data


Berkeley Skeleton King	Berkeley Boss Bandit	10	10	0	20
UCSC	Stanford A	0	10	0	10
Stanford B	Berkeley Archer Queen	10	10	10	30
Claremont C	UCLA D	10	10	0	20
Claremont B	UCLA F	0	10	10	20
UCSD B	USC B	0	10	10	20
Claremont A	UCLA C	10	10	10	30
UCLA B	UCSD A	10	10	10	30
Ottawa A	McGill A	0	0	0	0
McGill C	Ottawa C	0	10	0	10
Ottawa B	McGill B	10	10	0	20
Ottawa D	Carleton B	0	10	10	20
McMaster A	Toronto E	10	10	0	20
McMaster C	Toronto A	0	10	0	10
Toronto G	Queen's A	0	0	0	0
Guelph A	Toronto H	0	10	0	10
McMaster B	Toronto I	10	10	0	20
Waterloo A	Toronto B	10	10	10	30
Toronto D	Waterloo B	0	10	0	10
Toronto F	Waterloo C	0	10	0	10
Florida State A	Florida B	0	10	0	10
Florida Tech B	UCF A	10	10	0	20
Ohio State C	Louisville B	10	10	0	20
Louisville D	WVU B	10	10	0	20
CWRU B	Michigan A	10	10	10	30
Louisville A	Michigan B	10	10	0	20
Ohio State B	Michigan C	10	10	0	20
Louisville C	Michigan State C	10	10	10	30
Michigan State A	Ohio State A	10	10	10	30
Michigan D	Ohio State D	0	10	0	10
CWRU C	Pittsburgh	0	10	10	20
William & Mary A	JMU B	0	10	0	10
Duke A	Liberty A	10	10	10	30
Virginia A	Liberty B	10	10	10	30
Liberty C	William & Mary B	0	10	0	10
NCSU A	UNC D	10	10	10	30
UNC A	UNC C	0	10	0	10
UNC B	William & Mary C	0	10	0	10
VCU A	JMU A	10	10	0	20
George Mason A	Johns Hopkins	0	10	10	20
NYU A	Maryland A	10	10	0	20
Rutgers A	Penn	10	10	0	20
George Mason B	Princeton	10	10	0	20
George Mason C	Rutgers C	0	0	0	0
Rutgers D	Columbia A	10	10	0	20
Chicago A	Chicago B	10	10	10	30
Illinois Blue	Iowa B	10	10	10	30
Rose-Hulman A	Illinois Canada	0	10	0	10
Purdue A	Illinois Orange	10	10	10	30
Indiana B	Illinois Urbana	0	0	0	0
Iowa A	WashU Grizzlers	0	10	0	10
Purdue B	Purdue D	10	10	10	30
William Woods University A	WashU Grolars	10	10	0	20
Macalester	Iowa State	10	10	10	30
St. Thomas	Michigan Tech	0	10	10	20
Wisconsin B	Wisconsin C	0	0	0	0
Amherst A	Boston College B	0	10	0	10
Harvard	Boston College A	0	10	10	20
Brown A	Boston University A	10	10	0	20
Brown B	Dartmouth A	0	10	0	10
Williams B	Dartmouth C	0	10	0	10
Tufts B	Southern Connecticut State University A	0	10	0	10
Brandeis Bach	Tufts C	0	10	10	20
Vermont B	Amherst B	0	0	0	0
Williams C	Dartmouth B	0	10	0	10
Wisconsin A	Minnesota	10	10	10	30
Indiana A	Illinois Champaign	10	10	0	20
Arizona State B	Alberta A	10	10	10	30
Washington Pink	Arizona State A	10	10	0	20
British Columbia C	Boise State	0	10	0	10
British Columbia B	British Columbia A	0	0	0	0
Washington Atlantic	Washington Chinook	0	10	0	10
Washington Chum	Washington Masu	10	10	10	30
Washington State	Alberta B	0	10	10	20
Central Oklahoma A	Nebraska A	0	10	0	10
Central Oklahoma B	Nebraska B	0	10	0	10
Oklahoma	Harding	0	10	0	10
Rose State	Tulsa B	0	10	0	10
Tennessee B	Alabama A	0	10	0	10
Auburn B	Vanderbilt B	10	10	10	30
Georgia Tech B	Auburn C	10	10	0	20
Chipola College	Clemson B	10	10	0	20
Mississippi State A	Emory A	0	10	0	10
Georgia Tech C	Vanderbilt A	10	10	10	30
Auburn A	Georgia Tech D	0	10	0	10
Georgia Tech E	South Carolina A	0	10	0	10
Tennessee Tech	Georgia Tech F	0	10	0	10
Clemson A	Vanderbilt C	10	10	0	20
Cornell A	Rochester	0	10	10	20
RIT A	Cornell B	10	10	10	30
RIT B	Cornell C	0	10	0	10