The phrase "any substantial flow of" is correct and usable in written English.
It can be used when discussing the movement or transfer of something significant, such as resources, information, or people.
Example: "The report highlighted any substantial flow of funds that could impact the project's success."
Alternatives: "any significant movement of" or "any considerable transfer of".
However, there is no empirical evidence of any substantial flows of medicine from LMI countries to high-income countries [ 12].
The entry of hundreds of thousands of farm workers provided camouflage for a substantial flow of undocumented labour.Nonetheless, the logic of temporary migration appears irresistible.
Intermittently, at least since about 1830 and rather steadily from 1850, there has been a substantial flow of immigrant population into France.
Finally, the state's economic recovery generated a substantial flow of private investments into the real estate market.
All of this should guarantee a substantial flow of tourists, but Yemen remains a troubled place, enough so that the number of foreign visitors plunged after the Cole bombing and the simultaneous renewal of violence between Israel and the Palestinians.
If California does commit to tropical forest protection, advocates of REDD hope other states and countries, and perhaps large companies that buy food commodities, will follow suit, creating a substantial flow of funds.
The "executive branch's failure to crack down on illegal weapons traffickers or keep track of third party transfers of U.S. weaponry allowed a substantial flow of U.S.-origin military equipment and military components to make their way to Iraq".
Second, a collapsed currency would have provoked high inflation, since Iceland's substantial flow of imports would have become extremely expensive.
Despite the substantial flow of foreign tourists to the French capital, this revenue drain has an adverse effect on regional unemployment.
We use the metaphor branching career pipeline to describe this substantial flow of PhD-trained scientists into various sectors of the workforce, and propose that this branching should be seen as a valuable opportunity for spreading science throughout society.
