PIV-21

Table 2-21. Velocity profiles.

Ethanol evaporated without burning in boundary layer behind back-facing step.
Wind channel had no top lid, U₀ =11,2 m/s,
distance from barrier x = 20 mm.

x, y (mm) - longitudinal and transverse coordinates;
U, U', V, V', (m/s) - longitudinal averaged velocity and its RMS pulsations,
temperature (T, K), correlations U'V' (m ²/s ²);

Tu₀=1%
y,mm	T	U	V	U'	V'	U'V'
0	---
0,5	---	0,092	-0,068	0,532	0,403	0,075
1	---	0,396	-0,149	0,986	0,863	0,361
1,5	---	1,043	-0,252	1,543	1,293	0,962
2	---	2,143	-0,391	2,168	1,527	1,753
2,5	---	3,669	-0,561	2,802	1,596	2,458
3	---	5,485	-0,726	3,146	1,588	2,610
3,5	---	7,386	-0,844	3,162	1,551	2,440
4	---	9,118	-0,889	2,917	1,468	2,035
4,5	---	10,456	-0,850	2,440	1,249	1,401
5	---	11,365	-0,769	1,944	1,001	0,884
5,5	---	11,884	-0,696	1,328	0,842	0,526
6	---	12,132	-0,644	0,818	0,636	0,234
6,5	---	12,245	-0,616	0,469	0,428	0,052
7	---	12,282	-0,598	0,283	0,346	0,007
7,5	---	12,282	-0,576	0,253	0,309	0,011
8	---	12,259	-0,548	0,243	0,284	0,011
8,5	---	12,235	-0,521	0,223	0,270	0,009
9	---	12,207	-0,494	0,219	0,277	0,001
9,5	---	12,184	-0,465	0,226	0,286	-0,005
10	---	12,165	-0,437	0,224	0,270	-0,005
10,5	290	12,142	-0,411	0,213	0,277	-0,001
11	290	12,123	-0,388	0,219	0,288	0,004
11,5	290	12,104	-0,367	0,219	0,280	0,001
12	290	12,085	-0,349	0,204	0,273	0,000
12,5	290	12,062	-0,333	0,197	0,256	-0,004
13	290	12,043	-0,317	0,188	0,257	-0,003
13,5	290	12,020	-0,298	0,188	0,253	-0,001
14	290	12,001	-0,280	0,202	0,253	-0,005
14,5	290	11,987	-0,268	0,219	0,242	0,000
15	290	11,968	-0,259	0,218	0,241	0,002
15,5	290	11,954	-0,251	0,205	0,237	-0,001
16	290	11,940	-0,240	0,196	0,230	-0,002
16,5	290	11,917	-0,228	0,190	0,243	-0,003
17	290	11,898	-0,215	0,212	0,255	-0,004
17,5	290	11,884	-0,206	0,242	0,254	-0,003
18	290	11,870	-0,197	0,239	0,264	0,002
18,5	290	11,851	-0,189	0,260	0,278	0,013
19	290	11,833	-0,179	0,320	0,278	0,007
19,5	290	11,805	-0,166	0,457	0,321	-0,030
20	290	11,774	-0,150	0,506	0,349	-0,037

Presence of areas with abnormally high and null friction corresponds to the boundary layer with detachment and large-scale structures formed at the barrier flow.

x, y (mm) - longitudinal and transverse coordinates; U, U', V, V', (m/s) - longitudinal averaged velocity and its RMS pulsations, temperature (T, K), correlations U'V' (m 2/s 2);

Presence of areas with abnormally high and null friction corresponds to the boundary layer with detachment and large-scale structures formed at the barrier flow.

x, y (mm) - longitudinal and transverse coordinates;
U, U', V, V', (m/s) - longitudinal averaged velocity and its RMS pulsations,
temperature (T, K), correlations U'V' (m ²/s ²);