PIV-22

Table 2-22. 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 = 30 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	---	0,902	0,012	0,830	0,357	0,139
1	---	1,937	-0,044	1,685	0,918	0,702
1,5	---	3,168	-0,203	2,438	1,374	1,707
2	---	4,610	-0,419	2,826	1,599	2,501
2,5	---	6,098	-0,612	2,874	1,556	2,466
3	---	7,503	-0,736	2,702	1,417	2,079
3,5	---	8,687	-0,764	2,527	1,305	1,503
4	---	9,618	-0,734	2,191	1,120	0,936
4,5	---	10,297	-0,692	1,879	0,918	0,577
5	---	10,761	-0,652	1,609	0,800	0,320
5,5	---	11,070	-0,616	1,446	0,703	0,164
6	---	11,280	-0,584	1,291	0,587	0,066
6,5	---	11,425	-0,557	1,178	0,483	0,041
7	---	11,524	-0,538	0,922	0,399	-0,018
7,5	---	11,580	-0,529	0,575	0,333	-0,027
8	---	11,627	-0,520	0,370	0,305	-0,029
8,5	---	11,655	-0,504	0,275	0,282	-0,021
9	---	11,678	-0,485	0,252	0,275	-0,018
9,5	---	11,697	-0,469	0,233	0,273	-0,010
10	---	11,711	-0,453	0,215	0,259	-0,007
10,5	290	11,711	-0,436	0,196	0,254	-0,011
11	290	11,711	-0,419	0,187	0,246	-0,014
11,5	290	11,706	-0,407	0,190	0,233	-0,014
12	290	11,702	-0,396	0,193	0,238	-0,009
12,5	290	11,702	-0,385	0,192	0,244	-0,006
13	290	11,702	-0,371	0,186	0,245	-0,009
13,5	290	11,697	-0,355	0,194	0,233	-0,007
14	290	11,688	-0,343	0,190	0,228	-0,007
14,5	290	11,678	-0,336	0,190	0,234	-0,007
15	290	11,673	-0,332	0,193	0,238	-0,011
15,5	290	11,664	-0,323	0,178	0,236	-0,010
16	290	11,659	-0,312	0,168	0,242	-0,004
16,5	290	11,655	-0,300	0,183	0,246	-0,007
17	290	11,645	-0,291	0,187	0,237	-0,009
17,5	290	11,641	-0,283	0,182	0,249	-0,005
18	290	11,631	-0,273	0,205	0,260	-0,004
18,5	290	11,622	-0,255	0,221	0,292	-0,004
19	290	11,617	-0,234	0,226	0,303	0,000
19,5	290	11,608	-0,215	0,254	0,287	0,006
20	290	11,599	-0,202	0,249	0,291	0,008

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);